1/16" acrylic cracking - Engraving Etc. Forum

From:	Jim (PUZZLEHEAD)	27 Jun 2006
To:	markh789	7 of 8

4181.7 In reply to 4181.5
I have had this same problem with the reverse engravable Ultra-Mattes from Rowmark. Fortunately it has only happened a handful of times and hasn't happened to me in at least 5 years. It wouldn't happen right away, but when I came back in the morning, many of the signs looked like someone had taken a hammer to them My only guess is that it was older, more brittle material. I gave samples of it to Rowmark and Johnson Plastics, but of course they had never heard of this happening before. I don't have any solution for you except to try a slightly larger engraving cutter or use some acrylic from a different source. I definitely prefer using Rowmark's ADA alternative plastic whenever possible, but the majority of the time I use the reverse Ultra-Mattes.

From:	Angie	11 Jul 2006
To:	ALL	8 of 8

4181.8

Cracking of the material after inserting the Rasters into the holes is what is called "crazing." This is the result of using an alcohol-based or petroleum based cleaner or paint on the Braille. Alcohol makes all of the imperfections in the material expand and cracking results. Make sure to use a non-alcholic based cleaner when cleaning a sign.

Angie
Accent Signage Systems, Inc.

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