Advanced LM Pectin Calculator

1. Base Ingredients

Fruit Base (Optional)

Liquid/Puree Weight

Initial Brix (%) of Liquid/Puree

Initial pH of Liquid/Puree

Include other non-sugar ingredients in weight? (e.g., flavorings, water additions)

No Yes

Weight of Additional Ingredients

Target Sweetness (Final Brix %)

40%

Pectin Amount (%)

1.0%

Calcium Source

Calcium Chloride (36.1% Ca) Gypsum (22.5% Ca)

Calcium Dosage (mg Elemental Ca per g of Pectin)

30 mg

Recommended range for LMC Pectin: 25mg - 40mg.

CaCl2 Stock Solution Concentration (% w/w)

The research recommends a 30% stock solution for accuracy (Sec 2.2).

Crucial Rule: Hydrate Pectin First, Gel Second. Calcium Chloride is fast-acting.

Prepare Stock Solution (if needed): Dissolve 30g CaCl2 into 70g distilled water to make a 30% solution. Store this. (Sec 2.2)
Step 1: Dispersion: Thoroughly mix the Total Pectin with the "Sugar to Mix w/ Pectin".
Step 2: Hydration: Add the pectin/sugar mix to the COOL or lukewarm liquid base. Whisk vigorously or use an immersion blender.
Step 3: Dissolution: Bring to a rolling boil (or min 185°F/85°C). Hold for 1-2 minutes while stirring.
Step 4: Remaining Solids: Add the "Remaining Sugar". Return to a full boil.
Step 5: Calcium Addition: Measure the required Stock Solution. (Tip: Dilute this dose further in 1-2 tbsp of water, Sec 2.4). While the main mixture is boiling and being vigorously stirred, slowly stream in the diluted calcium solution.
Step 6: Filling: Remove from heat and immediately fill containers.

Note: Gypsum dissolves slowly, so the procedure is different.

Dispersion: In a dry bowl, thoroughly whisk together the Total Pectin, the Calcium Sulfate Powder, and the "Sugar to Mix w/ Pectin".
Hydration: Add the dry mix to the COOL or lukewarm liquid base. Whisk vigorously.
Dissolution: Bring the mixture to a rolling boil (or min 185°F/85°C). Hold for 1-2 minutes to hydrate pectin and dissolve the gypsum.
Remaining Solids: Add the "Remaining Sugar". Return to a boil.
Filling: Remove from heat. The gel will set as it cools. Pour into containers.

Water Hardness: Tap water contains calcium! This can make gels firmer than expected. Use distilled water for maximum consistency.
pH Impact:
- pH > 4.5: Pure calcium gel zone.
- pH 3.5 - 4.5: Hybrid zone.
- pH < 3.5: Acid gel zone. For LMC pectin, pH below 3.0 may weaken the calcium gel structure. Optimal fruit jam pH is 3.2-3.6.
Brix Impact: Sugar strengthens the gel up to ~40% Brix. Above 55-60% Brix, sugar can interfere with calcium binding and weaken the gel.