Improving Pressed Glitter Eyeshadow Longevity and Water Resistance

It sounds like you're experiencing creasing with your pressed glitter eyeshadow formulation, which is a common challenge. Adding a film-forming ingredient is an excellent approach to improve longevity and water resistance.

You are on the right track considering Hydrogenated Polycyclopentadiene (Isododecane Base) and Isododecane.

How Film-Formers Help

Film-formers create a thin, flexible layer on the skin after the solvent evaporates. This layer helps to bind the glitter and pigments together, adhere them to the eyelid, and provide resistance to water and rubbing, thus preventing creasing and improving wear time.

Hydrogenated Polycyclopentadiene (Isododecane Base) and Isododecane

• Hydrogenated Polycyclopentadiene (Isododecane Base) is an oil-based film-former known for providing long-lasting and waterproof properties. It forms a durable film that helps keep the glitter in place.
• Isododecane acts as a solvent and carrier for the film-former. It is a lightweight, volatile hydrocarbon that evaporates quickly, leaving the film-former behind. It also helps with the spreadability of the product and contributes to water resistance.

To use these two together, you would typically dissolve the Hydrogenated Polycyclopentadiene (Isododecane Base) in Isododecane. This solution then acts as a binder for your pressed glitter and pigments.

Regarding the ratio, as suggested by the staff, you can start by incorporating the Hydrogenated Polycyclopentadiene (Isododecane Base) at a rate of 10-15% in your formulation. The amount of Isododecane needed will depend on the desired consistency and how much is required to fully dissolve the film-former and effectively bind the powders. You will need to experiment to find the optimal ratio of the film-former to Isododecane, and the total amount of this binder mixture relative to your solid ingredients (glitter, pigments).

Compatibility with Existing Ingredients

Let's look at your current ingredients:

• Ethyl Alcohol: A solvent, compatible with both water and oil phases. It can help with dissolving certain ingredients and can contribute to faster drying.
• Glycerin: A water-soluble humectant.
• Aloe Vera Gel: Primarily water-based.
• Fractionated Coconut Oil: An oil-soluble emollient.

Your current formulation seems to mix water-based ingredients (Glycerin, Aloe Vera Gel, and partly Ethyl Alcohol) with oil-based ones (Fractionated Coconut Oil). Film-formers like Hydrogenated Polycyclopentadiene (Isododecane Base) are typically used in oil or solvent-based systems. Mixing water and oil phases in a pressed powder binder without proper emulsification or structuring can lead to instability and potentially contribute to the creasing you are experiencing.

To effectively incorporate the Hydrogenated Polycyclopentadiene (Isododecane Base) and Isododecane system for a pressed glitter eyeshadow, you would likely need to formulate it as an oil/solvent-based binder system. This means the Hydrogenated Polycyclopentadiene (Isododecane Base) and Isododecane mixture, along with Fractionated Coconut Oil (if desired), would be used to bind the glitter and pigments. The water-based ingredients like Glycerin and Aloe Vera Gel might need to be reduced or potentially omitted depending on the overall formulation strategy for a stable pressed powder.

Experiment with the ratio of Hydrogenated Polycyclopentadiene (Isododecane Base) dissolved in Isododecane as your binder, and then determine the optimal amount of this binder mixture needed to press your glitter and pigments effectively without creasing. The Fractionated Coconut Oil can be included in the oil/solvent phase as an emollient.

By using an oil/solvent-based film-forming system like Hydrogenated Polycyclopentadiene (Isododecane Base) and Isododecane, you can significantly improve the longevity and water resistance of your pressed glitter eyeshadow.