It looks like you're looking for information on "Milky Cat," a specific colorway or character associated with the brand DMC (often related to embroidery floss or potentially a niche collectibles brand). 

Longevity: DMC threads are known for being colorfast and fade-resistant, ensuring that the light, "milky" tones of the cat don't yellow or lose their vibrancy over time.

For 11CT canvas, it is standard to use 3 strands of floss for cross-stitching to ensure full coverage without bulkiness.

While DMC is primarily known for its high-quality embroidery thread, "Milky Cat" often describes a specific aesthetic or kit pattern. These designs usually feature soft, pastel "milky" tones to create a gentle, whimsical look for feline illustrations.