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| Posted on 4/24/08 at 05:24 AM | |
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What type of adhesive is it? There are several basic types. If you want to do this with chemical...there are pluses and minus's to the process and different types of chemicals for different adhesives. If you want to go the "mechanical" route....its simpler but also has drawbacks. Here we go.... (1) if the adhesive is clear-ish and hard as a rock , crispy and has sharp spots that cut your fingers...its a cyanoacrylate. The chemical method, you can either submerge the frame in a tray or use paper towels soaked with chemical to lay on top of the areas with adhesive. The object is to soak it for hours and just scarape it off in globs with a spatula. The main ingredient in this chemical is acetone. Cyanoacrylate is just an industrial superglue. There is a chemical that is called "cyanoff". It has other chemicals that slow down its evaporation...but its just acetone. Drawback: slow and smelly, but not a lot of effort. The mechanical version of removing this adhesive: Belt sander: This is one of the fastest ways to take off the adhesive, but because the belt is flat its hard to get down in uneven areas or dents. It leaves a decently roughened surface for gluing. Use grits UNDER 180. About 60 is ideal. Orbital sander: More comfortable to use and control than a belt sander and gets into the dents etc. BUT...it leaves the surface texture too smooth for great adhesion. You can take a rough four surface file and work the surface in about a minute per frame leaving even scratches in the surface at diagonals to the run of the threads...and it works very well. Sandblasting: This leaves the very best gluing texture and is the surface most frames came with when new. But...its slower than you think, requires a sandblasting booth. Drawbacks: You can't do any type of grinding inside of the shop near the screen room or the presses. The dust from all of this gets into everything. Do this outside or in a sealed room. You need ventilation and safety glasses. This stuff is not good for you. The other main adhesive types that you find in general screen frames are Urethane based two part. They are very good and very hard to get off. An example of this adhesive type is Kiwo 1000 hmt. When its uncured (still wet) you remove it with acetone. When its cured you use their remover Pregan DL. These adhesives no matter the brand are very tough to remove. So...if its red, dark brown, grey or blue and is not crispy....its probably a urethane. Grinding/sanding/sandblasting same as above works for these. Cheapest and quickest method? Go to home depot and buy an orbital sander with some guts that uses hook and loop sanding pads. Get 60 grit. Spend $20 on a package of a dozen cheapy files of all variety. You have your tools. Have fun! By the way...not having to do any of this is the beauty of retensionable frames. Ray [Edited on 4/24/08 by raygreenwood] | ||
 
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