Suggested materials
Materials for gelatin capsules.
A starting point for choosing shell and fill materials, from hard capsules and softgels to clinical-grade and hydrogel work. For specifications, samples and pricing, we refer you to Rousselot, the gelatin business of Darling Ingredients Inc., at darlingii.com. Darling Ingredients Inc. is not affiliated with Paxton-Digital.
How to choose
Start with the fill
Oils and lipid fills suit softgels; powders and pellets suit hard capsules. Reactive actives call for a shell designed to resist cross-linking.
Match the grade to the use
Oral nutraceuticals, pharmaceuticals and in-body or clinical research each need a different level of purity and documentation.
Specify the gelatin
Ask suppliers for gel strength (Bloom), viscosity, source and certifications such as halal or kosher where your market needs them.
Test on your equipment
Run trials on your own encapsulation line and stability programme before you lock a specification.
Hard capsules
Two-piece capsules for powders, pellets, liquids and capsule-in-capsule designs.
Softgels
One-piece soft capsules for oils, suspensions and lipid-based fills.
Clinical and biomedical work
Research, injectable, implantable and hydrogel applications where purity and consistency matter most.
Capsule fills
Active and functional ingredients that run well in capsule formats.
Talk to the supplier
Rousselot offers formulation support and can recommend the right gelatin for your capsule. Contact them directly through darlingii.com.
Suggestions are for research and planning. Product names are trademarks of their owners; confirm specifications, regulatory status and suitability with the supplier and your quality team before use.