Using products designed to brighten whites on coloured clothing requires caution. While it might be possible, it's not a simple yes.
Based on the information provided, products that brighten whites, like 'glow white', also have this brightening effect on fabrics. Due to this effect, we recommend carrying out a colour fastness test on coloured textiles before treating. This strongly suggests that direct use on coloured clothes without testing carries a risk.
Why Test Before Use?
Products that make whites appear brighter often contain optical brighteners or bleaching agents designed to counteract yellowing and enhance luminosity. While this is beneficial for white fabrics, it can potentially:
- Fade Colours: Reduce the vibrancy or intensity of dyes.
- Alter Shades: Change the specific hue of the coloured fabric.
- Cause Uneven Bleaching: Lead to patchy or streaky appearance if the product isn't distributed evenly or if the fabric's dye is not colourfast.
The primary reason for the recommendation to test is to prevent these undesirable outcomes on your cherished coloured garments.
How to Perform a Colour Fastness Test
Before applying 'glow white' to an entire coloured garment, it's crucial to perform a small test. This is a simple process:
- Find an Inconspicuous Area: Choose a hidden spot on the garment, such as an inner seam, the hemline, or inside a pocket.
- Apply a Small Amount: Apply a tiny amount of the 'glow white' product (mixed according to instructions if applicable) directly to the chosen area.
- Wait and Observe: Let the product sit for the recommended treatment time or a few minutes.
- Rinse and Check: Rinse the area thoroughly and check for any changes in colour, fading, or damage once dry.
- Evaluate Results:
- If the colour remains unchanged, the fabric is likely colourfast and you can proceed with using the product carefully on the rest of the garment, following product instructions precisely.
- If the colour fades, changes, or bleeds, do not use the product on the coloured garment.
| Test Result | Action |
|---|---|
| No change in colour | Proceed with caution, following product instructions. |
| Colour fades or changes | Do not use the product on the coloured garment. |
| Dye bleeds onto rinse water | Do not use the product on the coloured garment (fabric is not colourfast). |
Performing this test is a quick and effective way to protect your coloured clothing from potential damage.
Conclusion
While 'glow white' products are primarily designed for whites and help brighten them while having an antibacterial effect, using them on coloured clothes requires vigilance. Always test the product on a small, hidden area first to ensure the fabric is colourfast and the colour won't be adversely affected by the brightening properties. Without a successful test, it is not advisable to use the product on coloured items.
