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Re: Photo Resist Preparation - thanks for the suggestions


 

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Where is PKP-308i purchased?

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From: [email protected] <[email protected]> On Behalf Of Sam Reaves
Sent: Sunday, March 14, 2021 9:08 PM
To: [email protected]
Subject: Re: [homebrewpcbs] Photo Resist Preparation - thanks for the suggestions

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Negative resist. You use it with a negative. A bottle will?last a lifetime.

I think it is made by Transene now.

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Sam Reaves

ARS W3OHM

Owner and Moderator of:

LeCroy Owners Group on 开云体育

Electronics and Mechanical Hardware Design Engineering Manager

Andritz Rolls Global Research Center (RETIRED)

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On Fri, Mar 12, 2021 at 11:56 PM Jim Pruitt <jpruitt67@...> wrote:

Is kpr a negative resist?? Or positive resist?

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On Fri, Mar 12, 2021, 8:49 PM Sam Reaves <sam.reaves@...> wrote:

A friend of mine uses cosmetic cotton pads(get them at your local dollar store)? to apply Kodak Photoresist (KPR). When it is dry he places the unexposed boards in an old phone book for storage and pulls one out (all under a yellow safe light) when he needs one. He has used this method for decades.

Sam
W3OHM

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