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geekhack Projects => Making Stuff Together! => DIY Discussions ARCHIVE => Topic started by: ed_ on Wed, 18 March 2009, 00:01:32

Title: Model M case different material than keys?
Post by: ed_ on Wed, 18 March 2009, 00:01:32

I tried dyeing a Model M.  The keys, and the stems from the few two piece ones, came out perfectly, but the case just wouldn't take the dye.  It would just become a darker gray, looking as if it were just a filthy keyboard.

There was no problem with the dye; I tried enough orders and variations with multiple dye baths and keyboard sets that I can rule out anything like that.

What is the difference between them, and has anyone successfully dyed the case of a Model M?

I suppose that I could just paint and seal the case; since it doesn't get touched often it should last for a long time.

Title: Model M case different material than keys?
Post by: Chloe on Wed, 18 March 2009, 06:37:17

The case is most likely a different plastic, possibly ABS or HIPS. Some plastics (nylon, PBT) take the dye better.

Title: Model M case different material than keys?
Post by: Chloe on Wed, 18 March 2009, 08:12:22

That would explain the lack of yellowing on older boards. Melting point is only 80°C so more heat won't help.