100% brand new and high quality. [Features] It has excellent photographic performance and corrosion resistance. The outstanding feature is that after screen printing or spraying, it can be completely dried at room temperature (30-35 ° C) for more than 1 hour. It does not require baking for exposure, development and etching, which greatly improves the efficiency of production. Color: blue Weight: about 100g [Function] Metal anti-etching, anti-plating The blue paint needs dilute before you use it. This blue payment can replace the dry film,it can make better pcb board Note: Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 bottle × Photoresist Anti-etching Blue Ink Paint
D**G
Great NEGATIVE Photoresist
This stuff works great if you dilute at least 1:1, maybe 1:2 (1 part photoresist, 2 parts acetone) and apply a thin spray film to your pre-prepped copper PCB blank. It is very important to lightly sand the copper to remove the oxide layer before spraying. Even if the spray goes on a little thick, I haven't had much trouble achieving .050" trace widths. Remember: you must spray this on in a dark room with adequate ventilation. Ideally, use a spin coater to apply to avoid throwing the stuff into the air (because I'm sure it's toxic). With a thin, even coat I have gotten reliable .020" trace widths. NOTE: this is a positive photoresist which means exports of photonegative trace artwork from Eagle will need to be inverted using a vector graphics editor such as Inkscape to turn all black traces on white background into white traces on black background.
G**E
Don't use heat to dry it. That makes it hard to strip when your done with the etching part.
Rubber gloves, goggles, good air flow are absolute must.I applied it with air brush under yellow/orange light. Dilute about 1:3 with acetone. I let it dry over night in a dark room (24 to 30 hours).Used washing soda for developer, few grams in pint of water no more than room temperature.Exposure 6 min 8 inches form uv tube. If in doubt make a test print. Cover the test print at the start. Uncover a little at a time, about a minute each step. Same as in the old days of photo developing.The echant I used was one part muratic acid to 2 parts peroxide. This is where the rubber gloves are absolutely required. Good idea to have a bucket of baking soda water handy if bad things happen.Good air flow required for fumes given off during etching. This etchant can be used many times over.Ferric Chloride is another choice as the etchant. It stains and must be disposed of at Hazardous Martial site. Limited use.Please refer to the other reviewer's comments. Very useful.
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