Can you share information about chrome free and aldehyde free tanning?<br>
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We still can't get a decent crust that can meet automotive specs.<br>
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After spaying a base coat of a 70 Shore crosslinked PU dispersion, allowing it to dry and embossed it @ 90°C and 150 Kg, we couldn't get an even spraying of subsecuent coats of some other PU's dispersions.<br>
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We have tried penetrators, tensoactives, soaps, solvents like IPA and...