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Re: Printing Metal - Mottled effect
Posted: 01 Aug 2012, 11:58
by JackB
WorthDoingRight;50345 wrote:Do you know something we don't about Justin's abilities lol
If I told you he would have to kill you.

You will probably find that 90% + of the membership have at sometime forgot to remove the protective film off blanks that have them.
Jack.
Re: Printing Metal - Mottled effect
Posted: 01 Aug 2012, 18:58
by bms
pisquee;50326 wrote:Conde have a video on printing metal... say there are problems with moisture in the metal, so to preheat it a bit to get the moisture out, then print face up/paper down, with light pressure, avoiding too much pressure/bending of the metal (IIRC ... have a search for their video)
How does metal absorb moisture ??? I'm not a scientist but does that defy physics?

Re: Printing Metal - Mottled effect
Posted: 01 Aug 2012, 19:42
by gorgall2
Re: Printing Metal - Mottled effect
Posted: 01 Aug 2012, 19:45
by Ian M
bms;50359 wrote:How does metal absorb moisture ??? I'm not a scientist but does that defy physics?

Never seen a rusty car Martin?

It can be the surface coating that holds moisture such as paint etc.
Re: Printing Metal - Mottled effect
Posted: 01 Aug 2012, 20:07
by Justin
....and I'm guessing a plastic covering could make the metal sweat or possibly trap a small amount of moisture against the surface?
Re: Printing Metal - Mottled effect
Posted: 01 Aug 2012, 20:18
by bms
Thanks - and the answer at the link says...
"...no metals absorb water since they do not need any water for any purpose."

Re: Printing Metal - Mottled effect
Posted: 01 Aug 2012, 20:20
by bms
Ian M;50365 wrote:Never seen a rusty car Martin?

It can be the surface coating that holds moisture such as paint etc.
Isn't that the metal oxidising rather than holding moisture?

Re: Printing Metal - Mottled effect
Posted: 01 Aug 2012, 21:42
by Ian M
bms;50369 wrote:Isn't that the metal oxidising rather than holding moisture?

A lot of coatings can be quite porous when applied to metals. One good example of this if you put a matt primer coat onto metal & then leave it outside it will start to rust quite quickly due to it holding moisture. A good example is if you leave your car standing a few days & then look at the brake discs you will usually see a light film of rust on them from the moisture they have picked up from the atmosphere. Aluminum oxidises as opposed to rusting & again this is caused by any moisture in the atmosphere, ask any old Land-Rover owner as most of the outer panels are aluminum.
Re: Printing Metal - Mottled effect
Posted: 01 Aug 2012, 23:30
by WorthDoingRight
You don't suspect that the Titanic may have sunk not because it hit an iceberg but because it got thirsty half way around the world and decided to have a drink? :rolleyes:
Re: Printing Metal - Mottled effect
Posted: 03 Aug 2012, 00:52
by Hyraxx
did you resolve your problem?