Jesmonite & Plaster Mix Split Calculator
Obtain the exact grams of Jesmonite AC100 base powder and liquid acrylic resin needed for casting trays, planters, and plates. Includes custom waste sliders.
Jesmonite & Plaster Batch Splitter
Scale from 1 prototype to full production run
MEASUREMENT OUTPUTS
Jesmonite AC100 Batch Summary
Studio Batch of 1 piece of hexagon (SIDE LENGTH 6cm x DEPTH / HEIGHT 1.5cm) using Jesmonite AC100: • Per Single Unit: 192.9g Base Powder + 77.2g Liquid (Total: 270.1g). • Total Studio Run (1 Units): 192.9g Base Powder + 77.2g Liquid (Total Mass: 270.1g). • Mix Ratio: 2.5:1 | Waste: 10%.
MakerRatio • Studio Workshop Batch Sheet
https://makerratio.com • Precision Craft Formula Record
Date: _______________
Batch #: ____________
Project: Jesmonite AC100 (hexagon x 1)
Category: Mineral Composite
Dimensions: hexagon (x1)
Mix Ratio: 2.5:1 (Powder:Liquid) | Batch: 1 unit(s)
Specific Gravity: 1.75 g/ml
Safety Spill Margin: 10%
Batch Mix Breakdown (By Exact Weight)
Workshop Safety & Quality Protocol:
[ ] Ambient room temp 70°F–78°F (21°C–25°C) & mold leveled.
[ ] Protective nitrile gloves on & workspace ventilation active.
[ ] Mix thoroughly scraping sides and bottom for 3 full minutes.
[ ] Verify pot life and demold window per manufacturer TDS.
Curing Schedule Log:
Pour Time: ___________
Gel / Tack-Free: ______
Demold Time: ________
Recommended Materials & Tools for this Project
Jesmonite AC100 Composite Base & Liquid
Formula: Official 2.5:1 base powder to acrylic liquid ratio. Water-based, solvent-free composite for coasters, trays, and vessels.
Heavy-Duty Silicone Coaster Molds Pack
Specification: Flexible, tear-resistant platinum silicone molds (circle and hexagon) with thick sidewalls to prevent bowing.
Transparency Notice: As an Amazon Associate, MakerRatio earns from qualifying purchases at zero extra cost to you. Product recommendations are selected based on verified Manufacturer Technical Data Sheets (TDS). Always consult chemical safety data before pouring.
Calculating Jesmonite AC100 Mix Ratios by Weight
Jesmonite AC100 is an eco-friendly water-based composite material containing a reactive mineral base (powder) and a water-based acrylic resin (liquid). Unlike traditional plaster of Paris or concrete, Jesmonite requires a strict weight proportion of 2.5 parts base powder to 1 part liquid resin (2.5:1 ratio).
Because Jesmonite is dense (average dry density is 1.75 to 1.80 grams per milliliter), you need significantly more weight of material compared to the volume of your mold. For a 100 ml mold cavity, you must prepare approximately 175 to 180 grams of mixed material.
Total Mixed Weight = Volume (ml) × 1.75 × (1 + Waste Factor / 100)
Liquid Weight = Total Mixed Weight / 3.5
Powder Weight = Liquid Weight × 2.5
Mixing and Curing Best Practices
When working with acrylic composites, follow this sequence to avoid dry lumps or flash-curing:
- Liquid First: Always weigh the liquid component and pour it into your mixing bucket first. Do not add water.
- Sift the Powder: Slowly add the powder to the liquid while mixing continuously with a high-shear blade or paint mixer.
- Pop Air Bubbles: Tap the sides of the mixing container and vibrate the mold immediately after pouring to release trapped air.
- Curing: Jesmonite releases heat (exothermic reaction) and cures rapidly inside the mold (usually demoldable in 30-40 minutes). Let it fully cure in a dry room for 24 hours to achieve maximum compressive strength.