The invention discloses a method for preparing
ultraviolet color-changing printed fabrics. The prescription by weight percentage of fabric printing color paste is: X percent of
ultraviolet color-changing dye, 60 percent of natural modified paste material with the lid containing rate of 10 percent, 0.5 percent of glacial
acetic acid, 3 percent of
urea, and the balance being water, wherein the mixture ratio of X percent of the
ultraviolet color-changing dye in percentage by weight is: 0.2 percent of cationic violet 5BLH, 0.4-0.9 percent of cationic yellow X-10GFF, and 0.1-0.2 percent of cationic red X-5GN. A fabric printing process comprises the following procedures of taking a fabric, printing the fabric,
steaming the fabric, washing the fabric,
drying the fabric and obtaining a finished product. The parameters of a
steaming process are as follows: the temperature of heating with
superheated steam is 125 DEG C, and the
heating time is 30 min. The method overcomes the problems of hand feeling, free
formaldehyde, etc. caused by applying
adhesive to prepare ultraviolet color-changing printed fabrics in the prior art, has simple-convenient process and low cost, does not change the prior style of fibers, and is excellent in wet fastness and
rubbing fastness. Tests show that: the fabric is
environmentally friendly and safe, does not contain 23 carcinogenic aromatic amines or heavy
metal ions harmful to
human body, and is broad in market prospects.