Lots of good numbering information here:
http://www.collectioncare.org/cci/ccin.html and these folks sell Acryloid
B-67  http://www.collectioncare.org/cci/ccin.html#bap (you can get the
refill bottles separately if you don't need the whole labelling kit).



Quoting Marielle Fortier <[log in to unmask]>:

> Hello Museum-L members,
> 
> I have a problem that I just can't get my head around.  For the last few

> years I have been using b-72 and b-67 as my labeling layers (one for top
and
> 
> one for bottom). These had been made by my mentor in her lab.  At a
previous
> 
> job we had only used b-72 for a top and bottom layer.  Well my supply of

> b-72 has hardened and my b-67 has yellowed so I ordered from University 
> Products Clear and white acryloid. Yesterday I used the clear acryloid
for 
> the first time.  I let the bottom layer dry, used my handy pigma pen and

> applied the number...let dry, or so I thought and went to apply the top 
> layer. The whole number came off as soon as the brush for the acryloid 
> touched it. ( I have experimented 3 times and still can't get the number
to
> 
> stay on safely between two layers) What am I doing wrong? (Besides using
the
> 
> same material for a base and top coat? Or is that my problem?)  Am I not

> letting the pigma ink dry long enough, or is it as simple as not using
the 
> product correctly.  Any insight will be much appreciated.
> 
> 

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