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To clean - or not to clean ... ?
03-18-2021, 09:44 AM
Post: #3
RE: To clean - or not to clean ... ?
(03-18-2021 08:10 AM)isanchez Wrote:  Hi,

Congrats for the finding! It is really a remarkable calculator.

I collect these calculators and I have a large amount of them.
In my opinion: Do not open it, if not necessary, which is like saying: if it works fine, do not open it, moreover if it is necessary to break or put in (serious) risk aestethical aspects, which is the case.

I would distinguish between external cleaning and external restoring. I like to keep clean the calculators (some people talk about keeping the "patina", I talk about removing the dirtiness) and only in some cases, restoring. I.e. there is a big debate about restoring the silver lines in HP35 or not...this is a personal decision. ;-D

Enjoy your HP35!

Kind regards


Thanks Ignacio!

Yes, that is probably a wise/safe way to go. I will carefully clean the external, there are dirt etc on top of the keys and on the overlay, as well on the body itself, but I will refrain from opening the device.

I have no plans to try and "restore" it, I think it is ok to look used - gives some history to the device (after all it is almost 50 years old now!), but the "filth" could be removed - so it looks like someone takes good care of it.

As with all my calcs, it should be nice to have in your hand and should be used every now and then - not just being locked away!


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Messages In This Thread
To clean - or not to clean ... ? - ThomasF - 03-18-2021, 07:06 AM
RE: To clean - or not to clean ... ? - ThomasF - 03-18-2021 09:44 AM

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