About Pumice Stone
Pumice Stone is a volcanic rock composed of highly vesicular or perforated volcanic glass. It forms when super-heated and highly pressurized rock is violently erupted from a volcano. The distinctive foamy texture of pumice is a result of rapid cooling and rapid decompression.
Characteristics of Pumice Stone
- Pumice Stone floats on water.
- It is commonly sourced from Indonesia and Turkey.
- Available in various sizes, such as:
- 2-5 cm, known as small Pumice Stone.
- 3-5 cm, known as medium Pumice Stone.
- 5-7 cm, known as large Pumice Stone.
- The hardness of Pumice Stone on the Mohs scale is 6.
- The melting temperature of Pumice Stone is 1500˚C.
- The pH value is 8.
- The density is 2.313g/cm³.
Selection of Pumice Stone
- Pumice stones should be selected based on the desired end product and the effect required on garments.
- Larger and harder stones are suitable for heavyweight garments.
- Smaller and softer stones are suitable for lightweight garments.
- The ratio of stone weight to garment weight is [(0.5 to 3)/1] kg.
- The moisture content of pumice stone should be less than 5%.
- Surface properties of pumice stone should be less than 5%.
- Abrasion loss of pumice stones should be 35%.
- Apparent density of pumice stone should be 0.5-0.75gm/cm³.
Pumice Stone Usage in Stone Wash
- Stone washing is a process that intentionally gives garments a worn-out look.
- Fabric is washed with pumice stones in large industrial washing machines.
- The longer the stones and denim are spun together, the lighter the fabric color becomes, resulting in better contrasts.
- The duration of this process is pre-set to prevent fabric tear and wear.
- Subsequently, the fabric undergoes rinsing, softening, and finally tumble-drying.
- Stone-washed fabrics are used for various purposes, including garment manufacturing and upholstery.
Advantages of Pumice Stone
- Pumice stones can easily achieve the desired vintage effect on garments.
- Garments washed with pumice stones can attain a softer feel.
- The worn-out look is an intentional aspect of the stone washing process.
For those interested in pumice stone, readers can visit the Eco Stone Wash website at www.ecostonewash.com, or follow their Facebook page Ecostonewash for more in-depth information.