greensands
Part of the e-furniture
Building a Don Young 5" Black Five
Posts: 409
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Post by greensands on Mar 28, 2015 16:07:03 GMT
Hi All - My marking out blue has over the months appeared to have lost its adhesive powers when applied to both mild steel and brass, the coating becoming quite powdery on drying and easily wiped off with a wipe of a finger making it pretty useless in practice. The only reason I can think off which might have resulted in the problem is that some time back I added a small drop of meths to thin out the fluid. Is this likely to be the cause of the problem and if so, what solvent should be used for thinning out? Any thoughts and views on the matter would be most welcomed. - Reg
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Post by digger on Mar 29, 2015 17:15:06 GMT
Throw it out and buy some fresh, I use Starret blue and have found it to be very good.
Digger
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Post by mutley on Mar 29, 2015 17:29:42 GMT
I gave up on marking out Blue years ago. I now use permanent ink marking pens with large chisel nibs. Works a treat for me. it alao means I can choose the colour according to the base metal.
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Post by Deleted on Mar 29, 2015 19:26:26 GMT
Rocol Spray Blue is good and being in an aerosol lasts until you run out. I've had mine about 6 years now and still over 2/3 left. Bit expensive though.
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greensands
Part of the e-furniture
Building a Don Young 5" Black Five
Posts: 409
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Post by greensands on Mar 29, 2015 19:53:08 GMT
Your not joking regarding the costs of Rocol Spray blue
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Post by springcrocus on Mar 29, 2015 21:36:23 GMT
It's all right for you people with pots of money. I'm still using a tin of blue that's older than me!!  Steve |
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Post by simplyloco on Mar 29, 2015 21:49:44 GMT
It's all right for you people with pots of money. I'm still using a tin of blue that's older than me!! Steve I have something similar, but it's not for marking out: it's for clever stuff like scraping surfaces and fitting MT sleeves! Should I have gone to Specsavers?  John |
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Post by springcrocus on Mar 29, 2015 21:51:50 GMT
Same difference.  Steve  |
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jma1009
Elder Statesman
Posts: 5,901
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Post by jma1009 on Mar 29, 2015 21:53:54 GMT
i agree with john, micrometer's blue is for fitting not marking out!
i also agree with mutley and use permanent marker pens for marking out. removed with cellulose thinner. my last bottle of marking out fluid was used up over 20 years ago.
cheers,
julian
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Post by simplyloco on Mar 29, 2015 21:57:36 GMT
i agree with john, micrometer's blue is for fitting not marking out! i also agree with mutley and use permanent marker pens for marking out. removed with cellulose thinner. my last bottle of marking out fluid was used up over 20 years ago. cheers, julian My bottles of marking out fluid - one blue one for steel and another (white) for awkward stuff- are 20 years old, and at the current consumption rate will still be in use when Mars has been visited and colonised... John |
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Post by springcrocus on Mar 29, 2015 21:59:03 GMT
Fair comment. I got this, and another, tin from my late father and have never used anything else. If it does the job.... Steve |
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Post by simplyloco on Mar 29, 2015 22:07:24 GMT
Fair comment. I got this, and another, tin from my late father and have never used anything else. If it does the job.... Steve Just kidding Steve, whatever works for you. I'm enjoying this nice gentle interlocution. John |
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Post by springcrocus on Mar 29, 2015 22:19:12 GMT
To be honest, I didn't know there was anything else.  Tell a lie, I have used Rocol spray at some point but I remember it being too messy with overspray. Can't beat a rag in the tin, quick wipe over and away you go. Didn't know about fluid. Just goes to show, forty odd years in this lark and still learning. Hey-ho. Steve |
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jackrae
Elder Statesman
Posts: 1,333
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Post by jackrae on Mar 29, 2015 22:28:49 GMT
When I started my apprenticeship (1961) we were each given a small tube of engineer's blue and told in no uncertain terms by the shop manager that it was the only one we'd ever need as there was sufficient to last a lifetime. I think most of it was used within a couple of weeks to "mark up" our colleagues (as apprentices were apt to do) !!
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Post by simplyloco on Mar 29, 2015 22:38:14 GMT
When I started my apprenticeship (1961) we were each given a small tube of engineer's blue and told in no uncertain terms by the shop manager that it was the only one we'd ever need as there was sufficient to last a lifetime. I think most of it was used within a couple of weeks to "mark up" our colleagues (as apprentices were apt to do) !! When I started my apprenticeship (1963) we weren't trusted with a tube of our own. However, one of our much later tasks was to chip, file and scrape a 6" square surface plate using the 'three plate' method, and the stuff really came into its own: when finished we couldn't separate the plates without sliding them apart! John |
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Post by bobpendleton on Mar 30, 2015 5:06:15 GMT
Hi All - My marking out blue has over the months appeared to have lost its adhesive powers... Any thoughts and views on the matter would be most welcomed. - Reg A little bit of history: The "One and Only" - from www.clevedon-civic-society.org.uk/Spring2013.pdfAlthough Henry invented Engineers’ Blue it was his sons Les and Ken that started to market it in the 1920s. Ken was the one who did all the production work, manufacturing and distributing. The family lived at various addresses in the town including Hallam Road, Herbert Road and Madeira Road where Henry died. Production always took place in sheds of back gardens where they were living at the time. Bob |
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greensands
Part of the e-furniture
Building a Don Young 5" Black Five
Posts: 409
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Post by greensands on Mar 30, 2015 19:55:47 GMT
Update on the use of felt tip pens - I have now been given a felt tip pen made by Berol to try out, their Toughpoint Autoseal Ink brand which the makers claims to be suitable for use on metals with the added advantage that it is not sensitive to having the cap left off for lengthy periods.
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Post by Deleted on Mar 30, 2015 20:06:50 GMT
felt tip pens are great, I use one myself....just be aware that you need to ensure that the mark is properly cleaned after as if not it will show through the paint no matter how many coats you apply..
Pete
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Tell a lie, I have used Rocol spray at some point but I remember it being too messy with overspray. Can't beat a rag in the tin, quick wipe over and away you go. Didn't know about fluid. Just goes to show, forty odd years in this lark and still learning. Hey-ho.