Jonathan wrote:
I am trying to order a Juliette balcony. We have been using a dark
grey paint for everything external and it is BS4800 00-A13. The
company that I am trying to order from wants to know an RAL value
instead. I cannot find any conversion tables, can anyone please help?
I would be happy with an approximation as I understand conversion is
not precise.

Many thanks

Jonathan

You really need to compare up-to-date swatches under daylight conditions
to get the closest match.

If you go he -

http://www.e-paint.co.uk/Lab_values....ef=00%20A%2013

It gives Cie-LAB-1964 values for your BS 4800 00 A 13 colour.

L=38.853 A=-0.252 B=-0.587 D65

If you then plug the LAB values he -

http://www.easyrgb.com/index.php?X=CALC

Insert the following values:

Color space = Cie-L*ab

#1 = 38.853 #2=-0.252 #3=-0.587

K=leave blank

Illuminant=D65
Observer =1964

Click "start"

Then in the bottom RH corner of the black box, click "get commercial tints"

Leave the top two boxes and set the target color collection to RAL colors

Click start. Your BS colour is in the middle and the nearest RAL options
are round the outside.

By my reckoning, RAL 7010 is the closest match.

However, if you look he

http://www.icomsps.co.uk/colour_chart.htm

BS4800 00-A-13 is more like RAL 7015 than 7010, which just goes to show
that you *can't* really do this stuff looking at a computer monitor.

If you call in at your friendly local industrial paints supplier, they
may let you have a look at the swatches. Alternatively, you could buy
the swatches online.

HTH