Photochromic Hollow Crochet Yarn

·Material: 100% polyester
·Diameter: 2mm
·Packaging: 100m/50g/ball

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Description:
Photochromic Hollow Crochet Yarn combines UV-reactive color-changing technology with a lightweight hollow structure. Under indoor lighting, the yarn maintains its original color, while exposure to sunlight or UV light triggers a visible color transformation. When the light source is removed, the yarn gradually returns to its base shade.

Features:
1. UV-reactive photochromic effect that changes color under sunlight
2. Hollow structure for lightweight, breathable, and soft texture
3. Smooth crochet performance with clear stitch definition
4. Durable color-changing function with good wash resistance
5. The yarn is less likely to come apart during crochet.

Precautions for Photochromic Materials:
(1) Store in a dry and completely light-proof environment.
(2) Under the conditions mentioned above, the performance of most photochromic pigments shows no significant degradation after two years of storage.
(3) Avoid simultaneous use with UV absorbers, as the materials are highly sensitive to polarity.
(4) The processing temperature should be controlled below 150°C, and the heating time of the material should be minimized as much as possible. (High temperatures or prolonged heating will damage the pigment's color-changing properties.)
(5) Prolonged exposure to sunlight may degrade the color-changing performance.
(6) Customers are advised to conduct various tests with small samples before placing bulk orders to ensure suitability.
(7) Some color variation exists in functional threads, and even within the same batch, shades may differ.
(8) Do not wash with solvents.