This video provides a detailed tutorial on the chemical synthesis of a water-based personal lubricant, demonstrating the process at both a small (1.5 L) and large (50 L) scale. The formulation is based on a hydrogel created using carboxymethyl cellulose (CMC) as the primary gelling agent. Key additives include titanium dioxide for white opacity, food-grade glycerin as a humectant to control drying time, and phenoxyethanol as a preservative to ensure product stability and prevent microbial growth. The video outlines specific ingredient ratios and addresses the practical challenges of scaling up production, such as managing heat loss with insulation and utilizing mechanical stirring for effective mixing. The final result is a large, stable volume of a white, viscous, water-soluble gel, which is then prepared for a future project.
From Lab Bench to Bulk: A Guide to Making Water-Based Lube
0:01:21 Small-Scale Recipe: The video begins with a 1.5 kg laboratory-scale demonstration. The core ingredients are distilled water, titanium dioxide for color, food-grade glycerin to prevent rapid drying, phenoxyethanol as a preservative, and carboxymethyl cellulose (CMC) as the thickener.
0:02:55 Key Ratios for Consistency: The creator determines that the ideal ratio for the desired gel-like consistency is approximately 1 gram of CMC per 100 ml of final solution. For preservation, phenoxyethanol should constitute 0.5-1% of the total weight.
0:03:07 The Thickening Process: The process involves heating water to about 90°C, dissolving all additives except the thickener, and then slowly adding the CMC powder. The mixture is heated and stirred for an hour to break up lumps and allow the gel to form.
0:04:01 Scaling Up to 50 Liters: The second half of the video tackles the challenge of producing a 50-liter batch in a large barrel.
0:04:28 Insulation is Crucial for Bulk Production: When using a relatively low-power (1.2 kW) immersion heater for a large volume, insulating the container with towels is essential to reach and maintain the necessary 90°C temperature.
0:05:41 Large-Scale Ingredient Ratios: For the 50L batch, the recipe is scaled up to use half a kilogram of CMC. The creator recommends using 0.6 grams of titanium dioxide per liter of water for the right color and opacity.
0:08:21 Mechanical Mixing Required: Due to the high viscosity and large volume, a simple stir bar is insufficient. A power drill with a paint mixer attachment is used to properly incorporate the CMC powder and ensure a smooth final product.
0:09:01 Extended Cooling Time: The insulated 50-liter barrel retains heat for a long time, requiring an entire night to cool back down to room temperature, even with assistance from a fan.
0:12:18 Water-Soluble for Easy Cleanup: A major benefit of this formulation is that it is completely water-soluble, making the cleanup of equipment and spills straightforward despite the mess.
0:12:39 Final Product and Branding: The finished 50-liter batch is transferred into a new barrel for storage, which is then humorously branded with a custom-printed logo, giving the project a professional finish.