Generally positive resists use 10g/L sodium hydroxide at a set temperature. Negative dry film resists are developed in 8 - 10 g/L sodium carbonate at 28 - 35°C. I'm not familiar with the Kepro dry film but I assume its standard 'negative' aqueous processing resist. I have never seen positive dry film. Visit the Dupont web site for all the dry film technical information you'll ever need.
The basic dry film stripper is 30 to 100g/L sodium hydroxide at 10 to 40°C.
What type of process is "tinplating =" and "acid =" ?
Randy Knutson wrote:
> Greetings,
>
> I have a question concerning the 'wet method' of making circuit boards. Since I am new to making circuit boards I did a search a while ago and found kepro circuit systems and purchased all the items to make circuit boards using the dry film method. After it was all said and done and everything was shipped I had quite a bit of money invested. Since I have been following this group I have heard people using 'lye' as a developer. My question is this: Are there any common chemical substitutions which could be used replace any of the development stuff kepro sells? Example: developer=lye, stripper=bleach??, tinplating = ?, acid= ? etc.
>
> Thanks Much!
>
> Randy Knutson
>
> solarteam.mnsu.edu
>
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