Marking out

[DismalduncParticipant @dismaldunc]

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

[DismalduncParticipant @dismaldunc]

Whats that blue stuff called:-)

[Tony SimonsParticipant @tonysimons69671]

Hi

It is called Marking Blue, or layout blue. It is essentially Prussian blue mixed with meths. 

[DismalduncParticipant @dismaldunc]

Thanks  Tony, shall now go and google for some!

[JasonBModerator @jasonb]

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 LongParticipant @keithlong89920]

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

Keith

[NilochParticipant @niloch]

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.

[DismalduncParticipant @dismaldunc]

thanks again chaps, the post suggested by Niloch was interesting, think I will give the big fat marker a go

[the artfull-codgerParticipant @theartfull-codger]

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 Wood1Participant @johnwood1]

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

[Axel BentellParticipant @axelbentell]

Did anyone ever use Copper Sulfate as recomended by L.H. Sparey?

[Ian S CParticipant @iansc]

Axel, look at the other thread mentioned by Nilock. Something aboul boiling cabbages twice. Ian S C

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