STUARTS Micrometer Engineers Blauw 'Tube'

I RECALL BUYING A TUBE OF THIS SO MANY YEARS AGO, IT LASTS SUCH A LONG TIME THAT I THINK I HAD MY LAST TUBE OVER 55 YEARS. IF YOU ARE ASSEMBLING SAY A DIFFERENTIAL, YOU REALLY DO NEED THIS TO SHOW THE MESH OF THE CROWN WHEEL AND PINION. IT HAS SO MANY OTHER USES AS WELL, BUT ALWAYS KEEP A TUBE IN YOUR TOOLBOX, IT WILL BE THERE FOR YOUR LIFETIME, AND IT DOES NOT SEEM TO EVER GO OFF EITHER!

I bought the tin a couple of months ago, which seemed better value for money than the tube.But then I realised that all the reviewers of the tin who said they couldn't open it were 100% correct! Doesn't matter how cheap it is if you can't open the sodding thing.By comparison, this is much easier to use but I suspect it's not going to last very long.

Great stuff and is used by professional engineers. Makes the scribe markings very clear.

I used it for checking fit of a MT3 taper adapter in a Chinese mini-lathe spindle. A tube is less messy than a tub when you only want a small quantity of blue at a time. Worked exactly as expected and confirmed most of the runout was due to a damaged spindle tape

Bought this for marking out steel work but it doesn't dry and remains waxy so may be intended to indicate surface to surface contact areas. I probably didn't read the tech spec properly!