General Knowledge

Safety of Different Embroidery & Garment Materials

Formaldehyde is a compound often found in clothing. Used to preserve clothing material due to its properties in enhancing colour fastness, formaldehyde is present in many textiles products from nonwoven fabrics to thread.

Formaldehyde is considered a toxic substance in many countries and is declared by the International Agency for Research on Cancer as a human carcinogen. Ill effects of formaldehyde include irritation to the eyes, skin, throat and nose, and prolonged exposure to formaldehyde can lead to cancer and long-term damage to the lungs, among other serious health issues.

In garment manufacturing, the limit for Formaldehyde content according to the Oeko-Tex Standard 100 Certification is less than 16mg/kg for children’s clothing and less than 75mg/kg for adult apparel.

Dedicated to delivering safe and high quality products, the majority of Rapos Group’s products contain zero or very low formaldehyde content. You can browse all our products at

Chlorofluorocarbons, or CFCs in short, are an organic compound composed of carbon, chlorine, and fluorine. Developed for refrigeration and spray can propellants in the 1930s as a safer alternative to dangerous substances such as ammonia, the use of CFCs has grown immensely over the years.

The danger of CFCs is that it poses a serious threat to the Earth’s o-zone layer. When CFCs are introduced into the air, the high altitude ultraviolet radiation breaks down the compound and freezes Chlorine which has the potential to cause major damage to the o-zone layer.

For this reason, Rapos Group’s GEM Temporary Adhesive Spray and GEM Silicone Aerosol Spray do not contain any CFCs whatsoever.

Quality of Different Embroidery & Garment Materials

Colour Fastness is defined as a material’s ability to resist colour fading. It is a very important aspect of embroidery & garment manufacturing since it determines the quality of clothing for the end consumer.

Different materials have different colour fastness depending on variables such as method of production and raw material used. An example of a material with excellent colour fastness, or in other words high resistance to fade, is our GEM Polyester Embroidery Thread.

Polyester and Rayon are two different raw materials used in embroidery & garment production. While polyester is a synthetic material made from petroleum, rayon, or often referred to as Viscose, is a semisynthetic material made from regenerated cellulose fiber.

In terms of embroidery thread, rayon is often associated with natural properties of softness and comfort. However, a downside of rayon often observed is low colour consistency and high colour fading.

Polyester, on the other hand, has much better colour fastness and colour consistency. However, polyester thread can be stronger and tougher than rayon which may require slight adjustments of the embroidery machine.

Other differences between the two material include absorbency, texture, and look and feel. For different types of embroidery, each material hold a unique advantage.

If you are looking for an easy to use polyester embroidery thread, we recommend GEM Polyester Embroidery Thread which has been designed for ease of usage with excellent colour consistency and zero compromise on quality.

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