Drypoint needle. The Sacred Tree. Drypoint needle

 
The Sacred TreeDrypoint needle  Etching needles are must have tool when printmaking

1 Etching needles. The most common and accessible tool for drypoint etching is an etching needle. The first time or two, I probably would not needle them head to toe. The science behind dry needle therapy. Introduction Myofascial pain is a complex health condition that affects the majority of the general population. Superficial. The treatment technique called dry needling is defined by the American Physical Therapy Association(APTA) as a skilled intervention that uses a thin filiform needle to penetrate the skin and stimulate underlying myofascial trigger points, muscular, and connective tissues for the management of neuromusculoskeletal pain and movement impairments (Figure 1). Burr is the sharp ridge of metal thrown up while engraving with the drypoint needle which prints with a dark smudge though this is quickly worn away. Engraving is precise; drypoint is rugged, warm, and irregular. The needle tool is shaped like a sharp pencil. Wood handle, cork handle double pointed, and solid steel. Drypoint Artist use a drypoint metal needle to scratch the copper plate surface. 85. burr In printmaking, when a drypoint needle or other engraving tool is used to draw directly into a metal plate, small, fine pieces of metal are raised up on both sides of the scored line. When the design is completed the plate is immersed in acid, which eats away at the areas of exposed metal to create incised lines. etching An artist uses a needle to draw a design on a metal plate coated with acid-resistant varnish. needle. October 2003. This drypoint printmaking course will introduce students to the essentials of intaglio printmaking processes. Some charge about $40 to $60 per session, others as low as $15 per session. As one of the oldest printing techniques, drypoint etching is a versatile method of print production. Unlike etching, it does not involve acid. I applied the watercolour with a brush and blotted it back in areas with a scrunched up paper towel. Soft velvety lines . When the plate is inked and passed through a press, the burr creates a fuzzy, velvety effect at the edges of the lines. Watch a demonstration of a combination of two printmaking methods – a drypoint and a collagraph. 9. Test the sharpness of the needle's point against your skin. They are known to be involved in acute and chronic, localized and. ↘an engraving produced with a dry point needle. + READ MORE. Unlike etching, drypoint does not require the use of an acid-resistant ground. Aluminum cans can be sliced and laid flat and etched into on either side. Once most of the linear work had been completed using etching, Goya sometimes used drypoint to accentuate areas of the composition. This therapy is particularly useful when treating nerve pain, as it. OSF HealthCare Saint Anthony’s Health Center Rehabilitative Services at (618) 463-5171. (38. MTrPs are defined as points with excessive strain that, when palpated, can cause symptoms as localized/referred pain. It is an invasive procedure that involves inserting a thin needle into the skin and muscle to reach the trigger point. While the side effects from dry needling are usually minor, patients can experience:Introduction. The physical therapist inserts a "dry" needle, one without medication or injection, into areas of the muscle. The surface is inked, and the ink is transferred to paper with pressure. The image at the beginning of this post is a basic black ink print on Maidstone white rag. Add to Bag. This technique gave him more immediate control of his drawing on the copper plate, but its surface wore away during printing far more quickly than with an etching. English new terms dictionary. While a shared aim is to provide relief from pain, the practices are otherwise very. Lithography. drypoint. A drypoint/etching needle. , levator scapulae, lower trapezius, anterior scalene, or. When the needle is pushed through the metal plate, it leaves raised metal edges called the “burr. 7 out of 5 stars. Like etching, drypoint involves fluid and spontaneous drawing. During the etching revival of the mid-ninteenth century and the fin de siècle, the technique of drypoint was often used alongside traditional etching. The small flower is drawn with a diamond tipped drypoint needle, good for fine lines. Drypoint: Drypoint marks adds detail or tone of a linear burr type. In superficial dry needling, SDN, the needle is inserted superficially obliquely to the skin surface, to about 3-4 mm above the trigger point or painful area. Figure 1. DN can be divided into superficial dry needling (SDN) and trigger point dry needling (TrP-DN). The image area is below the plate's flat surface. 86111°W / 39. The process of scratching directly on the plate with a drypoint needle was well-suited to Wols's compulsive style. Increasingly, physical therapists in the United States and throughout the world are using dry needling to treat musculoskeletal pain, even though this treatment has been a controversial addition to practice. Needles can be left in for a period of time or may be removed immediately. As the drypoint needle creates the line work, what does it leave behind. Unit price / per . PAIN. Rembrandt van Rijn, Christ Preaching - The Hundred Guilder Print, about 1648. Needle felting supplies, instructional needle felting kits, the perfect fibers for needle felted sculpture, and original Sarafina tools are available at Sarafina Fiber Art. While the most common form of intaglio is etching, which uses acid to cut lines into the plate, drypoint is the most direct. 16 mm – 0. Study with Quizlet and memorize flashcards containing terms like Drypoint, Watteau and Fragonard, Caravaggio and more. Drypoint: An intaglio technique in which marks are cut directly into a metal plate using a tool with a sharp point. Citation. It is made of solid steel. Add to Cart. This may last anywhere from 12-48 hours. Last Updated:. 2. ” It’s quick. cross-hatched lines e. The line work can be hard to see while drawing into the plastic with the scribe or needle. The deep black shadows are accomplished by printing the burr that is. soft, velvety lines d. In creating his Christ Crucified between Two Thieves , Rembrandt used a drypoint needle in order to create _____. Soft velvety lines. It’s an unconscious muscle spasm, like when your eyelid won’t stop twitching. Dentistry tools, nails, and metal files can all be used to produce drypoints. 30 × 50mm needle is appropriate for most muscles. Drypoint is a printmaking technique of the intaglio family, in which an image is incised into a plate (or "matrix") with a hard-pointed "needle" of sharp metal or diamond point. In principle, the method is practically identical to engraving. AWQ-104LT Four Channel Electro-therapy Unit. Velvety areas of drypoint, which is particularly rich in this impression, describe the soft, downy lion’s mane and deep black shadows, creating a three-dimensional space. When you etch the lines into the plate, the needle pulls up a fine burr of copper around the lines. Using a sharp, pointed stylus, the. German Collectable Litho Needle Box with Baby and Dog. The needle's surface might be microscopically or visibly rough because of old scratches or corrosion, making the point falsely appear to be blunt. Drypoint involves scratching the plate to create a raised metal, while etching uses chemicals to remove metal. John Muafangejo's use of linocut in his piece Men Are Working in Town allowed the artist to do what? Create crisp compositions Carve and print text easily. Bourgeois employed drypoint more frequently than any other technique by far, creating some 1,500 prints that make sole use of it, or adding it to combinations of other intaglio techniques. Dry needling is a technique that involves the insertion of a needle into the tissue of, or. The difference is in the use of tools, and that the raised ridge along the furrow is not scraped or filed away as in engraving. (139) $50. Add to Cart. In principle, the method is practically identical to engraving. Thus, placing the technique in the school of intaglio printmaking methods. When you etch the lines into the plate, the needle pulls up a fine burr of copper around the lines. , Intaglio prints are made. Figure 2. A drypoint. The metal is displaced, creating what is called a “burr”. A drypoint/etching needle. This burr holds additional ink during the printing process and gives the lines a velvety or fuzzy texture. Rembrandt Etchings – The Good, The Bad and The Ugly. (Multiple Choice) Question 15 . Accurate needle penetration of the supinator muscle was observed in 100% of the forearms (needle penetration:16. This is the traditional approach to drypoint and works just like the juice box carton-technique we described here, but instead of a juice box you are using thin. Based on your symptoms, the provider may manipulate the needle after insertion. Acupuncture restores energy flow, while dry needling targets dysfunctional muscle trigger points. The point of the needle is used to create fine, delicate patterns on the metal surface. This creates a soft, heavy line that is unique to this type of intaglio. 3mm) and patients rarely feel the needle insertion into the skin. pen and ink. Drypoint. R. Is different from engraving where the metal burr created at the end of a cut is removed and smoothed down to the surface of the plate. an intaglio printmaking process in which the copper or zinc plate is incised by a needle pulled back across the surface, leaving a burr. Art Supplies from Jackson's | Etching Needles and Drypoints - Etching and Intaglio Tools - Etching and Intaglio - Printmaking - Colour | Jackson's Art Supplies - Jackson's Art Supplies - Finest Art Materials - Best Prices As one of the oldest printing techniques, drypoint etching is a versatile method of print production. 95. These needles have a sharp point, a large groove scarf, and an extra-large eye. soft, velvety lines d. Burin. The difference is in the use of tools, and that the raised ridge along the furrow is not scraped or filed away as in engraving. In drypoint, a needle is dragged across the surface, and a metal burr, or rough edge, is left in its wake to one side of the furrow. iDryNeedle Professional Series Dry Needles . He drew on the copperplate entirely in drypoint which allowed him to fully exploit the velvety areas of burr raised by the drypoint tool as it cut into the copper. Citation. The plate is passed through a(n)A technique in which the parts of the printing surface that carry ink are left raised, while remaining areas are cut away. Set 3. Learn more about the benefits and risks of dry needling from. the butterfly drypoint plate. DBC™ ProMaxx Sport Therapy Needles . E. It is designed with a sharp point that allows artists to scratch lines directly into the surface of the etching plate, creating rich, expressive, and textured lines in the final print. Open Etching Press. Add to cart. " The intaglio techniques—including. engraving OC. A pointed metal needle, much stronger than an etching needle, is used to draw directly into the copper plate. The intaglio method called drypoint involves pulling a burin, a needle-like tool, across the surface of the metal, making soft, fuzzy marks. Add to cart. Insertion: Both practices have the same process of inserting needles into the skin, however the depth of the insertion and target tissue will vary due to the. Add to Cart. The Old Steeple-Cab by Richard Pantell, 2002, drypoint Drypoint. It was printed using Akua intaglio carbon black with a 25% addition of pthalo blue. ) Twisted Scribe (or Whistler’s Needle) Cork Handled Etching Needle/Scribe (this one was used in the video) The drypoint needle is a specialized hand tool used in the art of drypoint etching. Because of the burr, a drypoint line holds more ink than an etched or engraved line. Button and Needlework Boutique offers a wide selection of needlepoint kits including Ehrman Tapestry kits which include 100% printed canvas, 100% new pure wool, needle,. Raised. These echo the linear composition of the web itself. Lewitt K. Engraving. Karel Lewitt – The “needle effect” – 241 patients with myofascial or spinal pain treated with dry needling • 86. Superficial dry needling (Baldry 2002; Griswold, 2019) is commonly used by many hands-on healthcare professionals. Starting at $15. Superficial. Dry needling, also known as trigger point dry needling and intramuscular stimulation, [1] [2] is a treatment technique used by various healthcare practitioners, including physical therapists, physicians, and chiropractors, among others. The point of the needle is used to create fine, delicate patterns on the metal surface. Dry needle therapy is commonly used for pain at the shoulder, neck, waist, and back. It involves the use of a diamond-pointed needle to incise lines directly into an unprepared metal printing plate, displacing metal ridges. TDN is the use of solid filament needles inserted through the skin and into the muscle to release painful myofascial trigger points. Here again, Rembrandt had more incentive to use drypoint than a modern artist. It. Eschewing the uniformity of the engraved line, he exploited the drawn qualities of etching and, increasingly, the blurred, velvety effects of the burr produced by the drypoint needle. A pointed metal needle, much stronger than an etching needle, is used to draw directly into the copper plate. the resulting print is also called a drypoint. Rembrandt van Rijn. It is hard to tell the difference between an engraving & a fine ______ drawing. . Art Supplies from Jackson's | Etching Needles and Drypoints - Etching and Intaglio Tools - Etching and Intaglio - Printmaking - Colour | Jackson's Art Supplies - Jackson's Art Supplies - Finest Art Materials - Best Prices. He drew on the copperplate entirely in drypoint which allowed him to fully exploit. The artist essentially scratches the surface in a sketch-like manner, creating a print that has a hand-drawn quality. The Three Crosses, Rembrandt's finest works in any medium, represents the culmination of his virtuosity as a printmaker. The drypoint needle is able to write out words on the plate. But unlike engraving the lines are. 2 in the summer of 2010. or 4 interest-free payments of $1. The artist may draw upon a sheet of paper laid over the prepared plate or place fabric, lace, or other flat media directly into the soft ground, as the coating records the texture of materials imprinted into it. Bottom line. Needles and other injection supplies, such. 2. Bourgeois employed drypoint more frequently than any other technique by far, creating some 1,500 prints that make sole use of it, or adding it to combinations of other intaglio techniques. They are pretty cheap to give away, sharp, thin and really light and nice to hold. This technique, known as sgraffito, is typically practiced in plaster, in slip on ceramic pieces before firing, or even on stucco walls. WikipediaEtching. Opaque Black Plexiglass to make a Drypoint Print. Asphalt, acid and needles are all supplies used in what printmaking process? etching. Fun Grab Bag of Goodies. The young artists. The thin, scratchy lines with their characteristic burr capture all the microscopic details of his barbed, nestlike microcosms and the fuzzy tendrils of his insectlike forms. The plate is then immersed in a bath of acid. There are multiple ways to add colour to a drypoint print. A book published in 1660, nine years before the artist's death, contains a. The drypoint needle creates a furrow by displacing metal along the side of the line rather than removing filaments of metal from the plate. Bibliothèque nationale de France, Department of Prints and Photography. Drypoint is a printmaking technique of the intaglio family, in which an image is incised into a plate (or matrix) with a hardpointed needle of sharp metal or diamond point. The working surface from which a print is made is called a _____. In other studies, needles with thicker diameters (>0. Takeaway. This technique dates back to the 15th century, and although it is not widely used, it. If the NEEDLE is held upright, the resulting line can be very sharp and fine. Regular price $ 25. Blick etching and engraving tools, needle tools, and sgraffito tools are studio essentials that have either metal. E C Lyons Etching/Drypoint Needles and Scribes. People also use needles to administer medicine or drugs. Dry Needling is a treatment for Tennis Elbow, Golfer’s Elbow and other conditions that involves repeatedly sticking a needle into tissues (usually muscle or tendon) that are not healing properly in the hope of stimulating a healing response. Bartsch 78 IV/V. Step 7: Hand Colouring the Print. Etching is an intaglio printmaking process in which lines or areas are incised using acid into a metal plate in order to hold the ink. He roughened the plate using the machine to scratch closely spaced parallel lines across the entire surface with the drypoint needle, rotating the angle of the lines and repeating the. 4 x 44. It is called “Dry” Needling because there is no solution injected as with a hypodermic needle during a flu shot. Drypoint, burr. Trigger point dry needling is a treatment used by physical therapists to eliminate these trigger points. It can also be used as part of the drypoint process. After her daughter Persephone is taken away by Hades into the underworld, Demeter seizes agricultural growth. This burr gives drypoint prints a characteristically soft, and sometimes blurry, line quality. Rembrandt skillfully employed drypoint for effect in this. When the needle penetrates the knots in a. During this procedure, it is essential to elicit twitch responses in the muscle. The artist then uses an etching needle to scratch through the ground, revealing the bare plate. Rembrandt often retouched his etched plates with a drypoint needle or engraver's burin, but in the 1650s his greatest prints are worked entirely in drypoint. To help improve this record, please email collections@artic. The technique uses a "dry" needle, one without medication or injection, inserted through the skin into areas of the muscle. This method of needling targets the sensorimotor system: the needle changes the. In drypoint, the surface is lightly scratched and the burrs formed are not removed. Dry needling therapy is one of the tools physical therapists use to reduce pain. When a person has painful muscles and trigger points, it is sometimes called myofascial pain syndrome. Rembrandt skillfully employed drypoint for effect in this. 2 Roulette wheels The simplest method for producing intaglio prints is drypoint, in which a sharp stylus or needle is used to scratch lines directly into the metal plate. van Rijn (Dutch, 1606–1669)The drypoint technique typically produces prints with irregular, soft fuzzy lines. Drypoint is a printmaking technique that involves scratching an image onto a metal plate. More immediate in process than engraving or etching, in this method the artist makes printable marks on a copper plate by scoring the surface with a sharp drypoint needle made of hard steel, often with a diamond tip. ”A drypoint is an INTAGLIO print pulled from a metal plate with an image drawn directly on it with a drypoint NEEDLE or other fine, sharp tool. Etching is an intaglio process in which the plates are covered with ink, which is forced into the linear depression. See how to score and snap the plexiglass in the videos that are linked in this post. Usually, people receiving dry needling attend between 3 to 6 sessions. Etching Introduction. Drypoint art is basically using a copper plate with a diamond or carbide-tipped needle to make indents in what is typically some kind of wood block, creating patterns, words, etc. If the point is still as sharp as it can be, then the needle may only need to be polished to improve its performance. Drypoint. Artists also like the drypoint technique for its own effects. Top Selling Needles. (Fig. an intaglio printmaking process in which lines are scratched directly into a metal plate with a steel needle. The artist has carefully structured overlapping elements to convey the various climates. 1979. The Old Steeple-Cab by Richard Pantell, 2002, drypoint Drypoint. Art is subjective, and everyone will create their own list of favorites, but it’s indisputable that Rembrandt’s humanistic style influenced many artists who came. Drypoint is the most simplisitic and direct form of printmaking: the printmaker would scratch into the plate using a fairly blunt needle, known today as a ‘whistler’ needle. Desboutin's technique was to quickly sketch a portrait on copper with a drypoint needle, to catch his subject in as relaxed and lifelike a pose as possible. 8% had the needle effect. Rembrandt Harmensz. This is one of the easiest techniques one can use since it does not require knowledge of complex processes. 5 mm) syringe needle was applied to treat patients in studies by Hsieh et al. The correct code for dry needling ( 1 or 2 muscles) is CPT code 20560 (Needle insertion (s) without injection (s); 1 or 2 muscle (s). engraving. Drypoint. This protrusion of metal around the lines gives the dry point etching its distinct look. Another method of marking the plate is with a very sharp instrument called a drypoint needle. a. It targets. Drypoint needle. Drypoint is a printmaking technique of the intaglio family, in which an image is incised into a plate with a hard-pointed "needle" of sharp metal or diamond point. Or for the purpose of “deactivating” highly-irritable, pain-causing spots in muscles, known as a. It can also be used as part of the drypoint process. He drew on the copperplate entirely in drypoint which allowed him to fully exploit the velvety areas of burr raised by the drypoint tool as it cut into the copper. For most patients, a 0. artist uses a drypoint needle to draw onto a metal plate (typically copper). The burr grabs and holds the ink, resulting in rich, fuzzy lines. The handles of these tools are made of mango wood and each handle has a 12mm diameter. Jerome is drawn freely with an etching needle while other areas, like the background buildings, are more detailed and finished. If you get dry needled, expect to feel 4 things: Nothing –The needles are very thin (0. This creates a local twitch response (a reflex) which is both diagnostic and therapeutic. 95. A general term for metal-plate printmaking techniques, including etching, drypoint, engraving, aquatint, and mezzotint. Because of the burr, a drypoint line holds more ink than an etched or engraved line. The needle is withdrawn slowly until this motion ceases. The technique appears to have been invented by the Housebook Master, a. At this visit, participants completed the FAAM, PPT, TSK, GROC, NPRS and muscle endurance testing. For the plates, tin or copper is the preferred material. What is drypoint? The process is like using a pen without the ink – literally, drawing with a dry point – to create an impression of a drawing which, when inked, can be printed from again and again. 00 Sale. The needle remained until the grasp released and the needle was easily removed by the physical therapist. The. Drypoint . )a treatment that involves a very thin needle being pushed through the skin to stimulate a trigger point. In printing, however, it represents the opposite end of the spectrum. Edward C. Etching : In an etching, chemicals are used to draw the. Next 37 End of Semester Test O A. Dry needling, also known as intramuscular stimulation, is the use of solid filiform or “noninjection” needles to stimulate specific reactions in an area of muscle tissue and the surrounding fascia, or membrane, in order to alleviate pain. thin lines c. e. Rembrandt clearly. Muscle tightness is allegedly reduced when the needle makes the muscle twitch. Like etching, drypoint involves fluid and spontaneous drawing. (2. There are many types of drawing needle on the market from reasonably priced wooden handled needles to diamond tipped tools. The effect of inserting a needle into the skin is manly to stimulate Aδ nerve fibers and thus activate inhibitory interneurons in the dorsal horn, leading to a gate control mechanism. Intaglio is a printmaking method that transfers images from a plate to paper. As the needle creates a shallow imprint beneath the plate’s surface, it raises a small ridge of metal known as a burr. When Rembrandt created this impression, he deliberately left ink on the printing plate; it lightly veils the figures standing at the foot of the cross on the right; a thicker layer. This burr holds the ink very well. Needles are commonly used by people living with diabetes to deliver insulin. Relieves Muscle Tightness and Pain. When the plate is printed, the ridges produce a velvet-like burr. Winding involves the insertion of the needle and twisting it in a “screw-like” fashion initiating the activation of receptors on peripheral nerve endings via mechanical disruption. The design carved into the matrix is reversed on contact with the paper. However, certain types of needles are created specifically for drypoints: Diamond-tipped needles carve easily through any. $7. After a needle is withdrawn, the tissue should be compressed for 5‐10 seconds, or for 30‐60 seconds using a cotton swab if there is any bleeding; this will help to ensure adequate hemostasis. Any effect of these therapies is likely because of the needle or placebo rather than the injection of either saline or active drug. ”. This drypoint printmaking course will introduce students to the essentials of intaglio printmaking processes. Lewitt K. The price for dry needling sessions varies according to practitioner. The simplest method for producing intaglio prints is drypoint, in which a sharp stylus or needle is used to scratch lines directly into the metal plate. What happens during the production of multi-block-colored print compositions? Each color is printed from separate blocks. I also experimented with printing the drypoint into a monotype made from a separate plate. Drypoint is a printmaking method in which a design is inscribed onto a plate using a sharp, needle-like tool. Drypoint needle. A 0. They. Maywhort DPT, in Orthopaedic Physical Therapy Secrets (Third Edition), 2017 1 What is dry needling (DN)?. Add to Cart. During a dry needling session, a clinician injects thin filiform needles (the same type of needle commonly used in acupuncture) into a trigger point. The efficacy of dry needling is still. Drypoint. The drypoint needle is used like a pencil to incise lines into the plate, displacing ridges of metal called burrs. cross-hatched lines e. In creating his Christ Crucified between Two Thieves, Rembrandt used a drypoint needle in order to create _____. Damp paper is laidDry needling tends to offer immediate relief from muscle tension and pain, however clients tend to notice peak improvement around 48 hours after treatment. Edition. These injections target “knots” in your muscles called trigger points that can cause. Trigger points are highly sensitive and painful when touched. Etching is an intaglio process in which the plates are covered with ink, which is forced into the linear depression. 1. L. See examples of DRYPOINT used in a sentence. An intaglio method similar to etching, but the lines are scratched directly onto the plate without the use of a ground (a kind of coating applied to the plate) or acid. The Sacred Tree. 2 x. $169. Figure 171. 00 Sale price $ 30. If the TrP is still sensitive, the needle is guided again into the muscle in the vicinity ofEngraving. It is important to note that gauge and length of needles vary (Figure 4). Blick etching and engraving tools, needle tools, and sgraffito tools are studio essentials that have either metal. Myofascial trigger points consist of multiple contraction knots related to maintenance of the pain cycle. The needle's surface might be microscopically or visibly rough because of old scratches or corrosion, making the point falsely appear to be blunt. Continue Reading. Rather, a special diamond tip needle is used to draw directly on the plate, pushing up the copper on. in printmaking, the total number of prints made and approved by the artist, usually numbered consecutively. Unit price / per . The burr, instead of the recessed line, absorbs the majority of the ink. Students will have the opportunity to. van Rijn (Dutch, 1606–1669) The drypoint technique typically produces prints with irregular, soft fuzzy lines. Since none of the Amsterdam plates were ever published, they are rare and highly sought after, with the Glasgow online catalogue listing a total of only 27 impressions. The drypoint needle is a specialized hand tool used in the art of drypoint etching. Starting at $12. These burrs hold large amounts of ink and provide drypoint lines with their. The experienced trained (Therapist with 5 years dry needling practice with license acupuncture course) performed dry needling of the muscles was blinded to the outcome measurements. Hind 270 IV/V. ramneekaur3447. Cutting; in printmaking, an intaglio process in which plates of copper, zinc, or steel are cut with a burin and the ink image is pressed onto paper. Intaglio. Etching • Etching is an intaglio process, but there are unique differences. The plate is. What is a burr? it is the ridge left by sractching a drypoint line in a copper plate. The needle itself is the treatment. An etching needle is perfect for the job, and can be bought in art stores, but you can also experiment with other sharp pointy tools found in the home - such as a metal skewer, a metal nail file, or the point of a compass. 7 mm 95%. ” “The drypoint print had a unique, textured quality due to the burrs left on the plate. Usually, the blades are made of 50% tungsten and 50% carbon materials. Drypoint generates a soft, warm line with a little quantity of ink extending beyond the line. For a full description of the etching process see this graphic, created.