The easiest job to work out will be the texture and bubbles. The mixture can’t be excessively thick when it’s being made and heated. If it’s excessively thick. air bubbles will acquire trapped in the mixture when it’s heated and won’t be able to acquire out. Try adding more H2O. It will take longer to dry. of class. but that will assist to acquire rid of the bubbles. You should besides do certain that it’s heated long plenty for the amylum to acquire “dissolved” wholly. and you should be able to plane any “foam” that might organize during heating from the top.
The overall thought is to do certain that you take your clip during the “cooking” stage. and do certain there are no balls in the mixture before you pour it into whatever signifier it will be drying into. The job of the plastic being weak and inflexible may be more hard to work out. The most obvious manner to increase the flexibleness of a bioplastic is to increase the sum of glycerin ( the plasticiser ) .
This will do the terminal consequence more pliable. but it will besides do the plastic weaker. So this might worsen the job of the plastic rupturing easy. One of the grounds for this is merely built-in in starch-only plastic. Starch. by itself. by and large does non do a really strong movie. I don’t know the parametric quantities of the undertaking. but if you could add some gelatin to the mixture to supply a stronger polymer. that would assist.