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Marking out

Whats that blue stuff called:-)

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Dismaldunc29/08/2010 12:10:06
91 forum posts
8 photos
Hi Folks, many moons ago when I was at school we used some rapid drying blue stuff to mark out on steel etc, I have no idea what it was called and would like to buy some. I tried "micrometer blue" but that stays sticky and smudges (which I now understand is its function).
 
I seem to remember we removed it from the work with meths
 
So your advise/help would be much appreciated
 
Duncan
Tony Simons29/08/2010 12:23:21
37 forum posts
Hi
It is called Marking Blue, or layout blue. It is essentially Prussian blue mixed with meths. 
Dismaldunc29/08/2010 12:28:51
91 forum posts
8 photos
Thanks  Tony, shall now go and google for some!
JasonB29/08/2010 12:29:53
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25215 forum posts
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As said and you should be able to get a small bottle from most of the model engineering suppliers.
 
But make sure you do not buy engineers blue which comes in a small flat tin, this is a thick paste use to test the fit of parts.
 
A large permanent marker pen can also be used but I find it comes off quicker.
 
Jason
Keith Long29/08/2010 12:30:51
883 forum posts
11 photos

Easiest is a broad felt tip marker, cover the metal and scribe the lines through that.

Keith

Niloch29/08/2010 12:51:39
371 forum posts
You have already been given the essential information but you may well be interested in this thread which attracted 32 posts from early May until a couple of weeks ago.
Dismaldunc29/08/2010 15:06:05
91 forum posts
8 photos
thanks again chaps, the post suggested by Niloch was interesting, think I will give the big fat marker a go
the artfull-codger06/09/2010 22:56:28
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304 forum posts
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there's two types of marking blue [I have both] there's the translucent type for marking bright metals & also the opaque type for marking black bar etc,I like the idea of dipping a felt tip into marking blue, you get the best of both worlds!!
John Wood107/09/2010 14:33:01
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116 forum posts
Marking out blue or Layout blue is available from (among others) Chronos http://www.chronos.ltd.uk/  It is easily removed with methylated spirit.  I put it on with a small brush and a small amount will probably last you for years.
 
John
Axel08/09/2010 06:58:03
126 forum posts
1 photos
Did anyone ever use Copper Sulfate as recomended by L.H. Sparey?
Ian S C08/09/2010 08:09:22
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7468 forum posts
230 photos
Axel, look at the other thread mentioned by Nilock. Something aboul boiling cabbages twice. Ian S C

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