Sorry I didn't understand that.
If I print the patches with MY paper and MY printer before sending them to the "professional profile maker" then I regard this as "printer specific".
Isn't it?
Thanks
Some, absolutely not all products (hence the reason generalizations are
worthless) provide pre and post optimization.
In a prefect world, we'd actually produce nearly all visible colors as patches to measure. We can't produce, measure or build profiles with millions of patches. Even if we had super fast Spectrophotometers and people were willing to make that many prints, the resulting profile would have a document size that was likely larger than many images we wish to print. So all profile making software has to extrapolate based on the number of patches it is feed. More isn't necessarily better either! Those products that allow the creation of custom targets, pre and post optimization targets and who's users are good at producing such targets allow for (in theory and often in action), superior quality profiles. I routinely make optimization targets with a custom patch set for all the profiles I create. Sometimes the added work shows no difference, sometimes it does! And it's quite easy to compare the original profile and the optimized profile visually with good test images and colorimetrically by running tests with the correct software products. Because I never know if the optimization will show no or slight improvements, I just make the optimization steps as a basis for all profile creation. It only takes 3 8x11 sheets of additional paper and with an auto Spectrophotometer, about 10 minutes of work.
So here is yet ANOTHER area where DYI or custom profile services WILL differ. Do they provide the ability to optimize the original profile with additional measurements? Will they provide colorimetric reporting IF the customer desires to see additional non ambiguously data about the profiles? Will they build profiles with differing white point assumptions (instead of the usual default of D50)? Do they offer OBA compensation? The answer is yes and no. So much for silly generalizations about all DYI users and all outside profile making services. THEY DIFFER.
In addition to all the above, there are tools like
ColorAnt that allow us to 'massage' the measured data. Again, in some cases, this can produce a superior profile.