The best results in batik are achieved when you find a balance between dyeing and cracking. It is after all those little crack lines that give batik its unique magic, but if left unattended or for too long too much of the dye seeps through. Of course, different dye colors also seem to have different properties, some seeming to soak through the wax more than others. Overall, however, it is the temperature of the dye bath and soaking time that make the most difference. If the dye water is too warm (great for dissolving the powered dyes), the wax will be too bendy; no cracks. Best to have the water as cold as possible, even icing it, if you wanted to try and go so far.