Playing with HP2640B

The screen on my HP2640 had degenerated quite far. It was only a spot in the middle, 2 by 4 inch, that still attached the glass to the CRT. I used a thin fish fillet knife to dig through the remaining glue. Before https://scontent-arn2-1.xx.fbcdn.net/v/t1.0-9/23622163_10155696765784985_65… The result after: https://scontent-arn2-1.xx.fbcdn.net/v/t1.0-9/23621971_10155696757184985_19… Anyhow, I researched the glue a bit. The glue is, as far as I understand, PVAc (PolyVinylAcetate, sometimes also known as PVA). PVAc is not soluble in water. It takes quite high temperature to melt it. However PVAc is soluble in many esters. I bought some Butylacetate. It dissolves sample bits of glue from HP2640 quite well and rapidly. Butylacetate has quite high boiling temperature (about 120 degrees centigrade) and thus does not evaporate that quickly. So my idea is now to test on a 2645 screen or VR201 screen by adding some butylacetate and seal with some thin plastic wrap foil and let it dissolve a bit. Then use the fish fillet knife again and repeat the process. /Mattis