QTR-Quadtone RIP

That is the correct formula yes.

In excel (provided the top number starts at A1): =((A1-$A$21)*100)/($A$1-$A$21) then drag this down.

Best,
Walker




> On Mar 9, 2019, at 5:00 PM, Simone Simoncini ssimoncini@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:
> 
> 
> maybe
> 
> scaled value=(original value - minimum value)*100/(max value - min value)
> 
> On Sat, Mar 9, 2019 at 1:24 AM skapuskar@... <mailto:skapuskar@yahoo.com> [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com <mailto:QuadtoneRIP@yahoogroups.com>> wrote:
> 
> When I used my old densitometer, I got better results with zeroed-out density values, that is, I measured my step wedges and zeroed-out to paper white.
> Now I'm using a spectrophotometer and I obtain LAB values, like this:
> 
> 93.9321
> 91.4298
> 88.1817
> 83.4927
> 78.2883
> 71.3222
> 65.4938
> 60.6404
> 54.9781
> 49.7342
> 44.4122
> 39.0966
> 34..6358
> 30.5362
> 26.4416
> 22.1175
> 19.0314
> 15.7048
> 12.0409
> 9.3780
> 7.6883
> 
> Is there any way to zero-out these values to convert the lightest value from 93.9321 to 100 and the darkest from 7.6883 to 0?
> 
> Thanks for any advice
> 
> Sidney
> 
> 
> 
> 
> 
> 



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