I just wanted to reopen this discussion.
I have been working through this and I am unhappy with the way the fitted parameters are dealt with. Mainly because fitting these three parameters to minimize the residual often causes unrealistic plot shapes.The way I found best to fit this data, is to:
- Make Dp0 the maximum thickness measurement you observed, which if you wish to accurately
- Make Ecrit the dosage at which the first cured layer was observed minus ~5-10 mJ/cm2.
- You should be able to adjust dDp/dE only then to fit the data.
I guess the point I am making is that you can vary these things to obtain the best fit, but Ecrit (and Dp0 to some extent) are properties which are defined by a specific value and obtaining the mathematical best fit to the data may give you something that fits perfectly but the actual values are meaningless.
Also I have done this for a few resins, how can we share it here?