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Old 29th August 2005, 03:46 PM   #11
Did it Himself
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I thought it was Sodium Hydroxide, just checking. Might try acetone though just to see. NaoH on it's own seems to leave a film behind.

Paint shop? The stuff I use is drain cleaner.
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Old 29th August 2005, 07:29 PM   #12
mzzj is offline mzzj  Finland
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Quote:
Originally posted by richie00boy
I . NaoH on it's own seems to leave a film behind. ... The stuff I use is drain cleaner.
Impure NaOH or something else mixed to drain cleaner?
I have used 2% NaOH and result is as clean as possible. Leave soaking for 2-15mins and rinse with hot tap water after NaOH and you should be done.

Steel wool or abrasive paper takes years to remove etch resist what we use at local univ. especially if I exposure bit longish time(paper mask for example) Maybe that resist is stronger than some others, it is also negative instead of usual? positive resist.
After drilling i use also steel wool to remove drilling burrs
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Old 29th August 2005, 07:43 PM   #13
AuroraB is offline AuroraB  Norway
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If it is sold as "drain cleaner", it might have some other additives...
Over here we buy it at the paint shop as "caustic soda",- also used for paint stripping and heavy duty cleaning
( and beleive i t or not: to make "lutefisk"-- dried cod soaked in lye, then rinsed for a couple of days in water.... a well known norwegian delicacy, mostly used around x-mas time.... and-- it is no joke !!!!!)
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Old 29th August 2005, 08:05 PM   #14
mzzj is offline mzzj  Finland
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Quote:
Originally posted by AuroraB
If it is sold as "drain cleaner", it might have some other additives...
Over here we buy it at the paint shop as "caustic soda",- also used for paint stripping and heavy duty cleaning
( and beleive i t or not: to make "lutefisk"-- dried cod soaked in lye, then rinsed for a couple of days in water.... a well known norwegian delicacy, mostly used around x-mas time.... and-- it is no joke !!!!!)
We eat here that NaOH-cod also
but Swedish rotten herring(fermented) is absolute no-no for me

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