how is this sign produced?

[David_Evans]

It could be dye subbed i think

[Martin Kennedy]

Hi David

It’s not dye subbed – the letters and logos etc. are sunken into the stainless steel by about 0.5 to 1.0mm.

Anybody else know who would sell the equipment or be able to help?

Martin

[Simon Strom]

Yeah not really sure how that ones made. I’ve never seen color engraving of that type before (although I’ve done color printing with inks from an engraved plate). You might contact one of the people found in this link. They might be able to scrounge up who produced the plaque in question. Re-post if you don’t mind when you find out how it was done. I’m curious now.

http://www.offlicencenews.co.uk/informa … fault.aspx 😀

[John Gregson]

Hi Martin,
A friend of mine told me that they used to etch brass by screen printing it. Basically you screen print a negitive (full solid apart from the lettering), when this is dry its washed in an acid bath. The solid ink or whatever is used is uneffected by the acid and the lettering is etched away. The ink stuff is then washed off and the etch is filled with which ever colour you want.

I think thats how it works :lol1:

Cheers John

[Glenn Sharp]

yeah….I have done etch work before although I was never part of the set up

basically you print the resist as John says in negative… the exposed material is then attacked by the acid which is eaten away…the resist is then washed off and you can fill in the coloured areas by hand

the acid etching is a bit of a science though…not something that you can just play with

I don’t know anything about laser engraving but I would imagine 1 offs are done by laser rather than an expensive screen print setup

[Rodney Gold]

https://www.uksignboards.com/viewtopic.p … hing#19658

The type of lasers that work deep into metal are normally galvo NdYags and can only do small areas as well as not being able to get good penetration or controlled depth , it’s unlikely to be lasered.
If you want more info on etching , like what mordants to use on various metals or info on resists , ask here.

[Martin Kennedy]

Hi All

Thanks for the info guys.

Rodney – I am very interested in finding out more about the use of mordants with metals etc. I have read the details and description that you posted here a few years ago – it was very informative. Have you found out any more or have more info since this post? Did you ever get around to doing a demo and explanation on the ‘production; model of your idea to include hot mordant spraying?

Any more help and info would be appreciated.

Cheers

Martin

[Vijay Wadhwa]

Hi Martin

I know a company which sells etching machines

http://www.ideafactory.co.in

cheers
Vijay 😀