Re: alizarin crimson and lightfastness

[Katharine Thayer <kthayer@pacifier.com>]

P.S.  Are you sure Sennelier isn't using a rating system where 1 is  
the worst?  :--)
kt



On Aug 8, 2008, at 9:03 AM, Katharine Thayer wrote:

> Don't trust manufacturer's ratings on lightfastness; they are often  
> not, well, trustworthy.  If it's PR83, you can be sure it's not  
> permanent, regardless of the manufacturer's rating.
> Katharine
>
>
>
> On Aug 8, 2008, at 8:36 AM, Laura Valentino wrote:
>
>
> > I read on the Handprint website that alizarin crimson PR 83  has a  
> > very low lightfastness rating, but the label on my tube of  
> > Sennelier Aquarelle brand gives it an ASTM rating of 1. What gives?
> >
> > Best Regards,
> > Laura