Butterick 4894; 1970s; Full color permanent transfers. Fabrics: For the best results, use 100% polyester or nylon fabrics or their combinations. Results on 50% polyester and 50% natural fabrics will be fair. Any natural fabric, such as cotton, wool, silk, or their derivatives: rayon or acetate will produce poor results and transfer image may wash out. The more polyester or nylon in the fabric the more brilliant and clear the transfer image will appear. Iron heat: Any fabric used must be able to withstand "cotton" temperature - medium/high or 380-400 degrees F. No date on pattern envelope;