FAQs

Why is my HM Pectin jam failing to set, and how do I fix the boiling parameters?

HM Pectin fails to form a gel matrix primarily because the formulation falls outside its narrow kinetic window for hydrophobic bonding. Check and adjust these three critical parameters:

1. Soluble Solids Content (Brix): Ensure the final sugar concentration is at least 60% to 65%. Sugar acts as a dehydrating agent, forcing pectin chains closer together.

2. pH Adjustment: Measure the pH using a calibrated digital meter. It must be between pH 3.0 and 3.3. If it is above 3.5, add a 50% citric acid solution dropwise to lower the pH and neutralize the negative charges on the pectin molecules.

3. Boiling Duration: Avoid prolonged boiling. Pectin is subject to acid hydrolysis at high temperatures, which breaks down the molecular chains and permanently destroys gel strength.