Cleaning Spice & other old calculators

[Steve Simpkin]

(03-30-2015 04:23 PM)PANAMATIK Wrote:  

(03-30-2015 06:01 AM)Dieter Wrote:  Is isopropyl alcohol safe for the painted labels below the keys? And what strength do you recommend? The usual 70% or something different?

BTW, I often use disposable wet cleaning wipes for glasses or lenses, for instance like these. I think they work quite well. Since they are designed for cleaning delicate (and coated) glass surfaces they can be expected to do no harm to calculator displays either.

Dieter

Isopropylalcohol is NOT save! I wiped part of a yellow printed label of a HP-25 away. I still suffer from this shock. I used high percentage alcohol, I don't know if lower percentage would be safe, but I don't think so. Even pure water I mistrust now.

Instead I like to know, how it could be possible to reprint the labels? Has anybody done an attempt by silk screen printing?

Bernhard

Yes the paint on the face plate labels becomes very delicate with age on the Woodstock series. I'm not sure wiping them with mild soap and water is safe.