Very early HP25

[jebem]

(09-30-2015 10:04 PM)Harald Wrote:  Ohh, I think you weren't even talking about my calculator, but the one jebem posted a picture of. Maybe he knows a good way to bleach the case.

Well, I believe it is a combination of two factors:
-I use to dismantle my new acquisitions piece by piece as much as possible, then I use warm water and regular detergent for hand dishwashing to rub the case parts gently with a sponge.
- And a small trick of a red background, causing the white/yellows to be whiter when I use this low cost Samsung ST60 digital camera