I'm currently using Ferric Chloride in a triple etching tank - a bit messy but does the job cheaply and quickly.
I've also got a small tub of Sodium Persulphate with a couple of other chemicals mixed in for good measure - I've used it before and its a lot cleaner then the FeCl but very expensive. It also has a limited shelf life after mixing but is much better for the environment on its disposal.
On an emergency callout yesterday I noticed the company using a lot of chemicals so asked the chap who does the buying if he could have a word with his supplier and get me a price on Sodium Persulphate. I can get a 25kg bag of the stuff for £50 so that makes it worthwhile.
Is a solution of Sodium Persulphate dissolved in water without any other chemicals going to cut the mustard ? I dont want to get into any exotic chemicals or mess about with acid solutions but do make 30-40 PCBs a month.
Cheers
Dom
I've also got a small tub of Sodium Persulphate with a couple of other chemicals mixed in for good measure - I've used it before and its a lot cleaner then the FeCl but very expensive. It also has a limited shelf life after mixing but is much better for the environment on its disposal.
On an emergency callout yesterday I noticed the company using a lot of chemicals so asked the chap who does the buying if he could have a word with his supplier and get me a price on Sodium Persulphate. I can get a 25kg bag of the stuff for £50 so that makes it worthwhile.
Is a solution of Sodium Persulphate dissolved in water without any other chemicals going to cut the mustard ? I dont want to get into any exotic chemicals or mess about with acid solutions but do make 30-40 PCBs a month.
Cheers
Dom