Light fastness refers to the performance of UV flexo printing ink that its color does not fade under the action of sunlight. To master the lightfastness of various UV flexo inks, you must first understand the lightfastness level of each UV flexo ink, which is divided according to the BWS international standard. The BWS consists of 8 levels, from the lowest level 1 to the highest level 8. All UV flexo inks must be tested for lightfastness in a specific laboratory. To ensure that the printed matter can maintain bright colors for a long time.

The main difference between UV ink and LED-UV ink is the light source used to cure the ink. UV ink is cured using a mercury vapor lamp, while LED-UV ink is cured using light-emitting diodes (LEDs).

UV flexographic ink is an environmentally friendly ink that uses ultraviolet light curing technology. It does not produce volatile organic compounds (VOC) during the printing process and is environmentally friendly. It also has the advantages of fast curing, high printing quality, bright colors, and strong adhesion.

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Generally, UV offset ink is known for its excellent fade resistance. This is one of the key reasons it's preferred for many applications. The curing process, which involves exposing the ink to UV light, creates a highly durable and resistant finish.

Many people is confuse of what is the difference between UV offset ink and regular ink.The most difference is the drying method.

UV offset ink is one kind of ink can print on both paper and pvc,which different from the normal offset ink.So uv offset printing ink has many kinds of benefits.

UV offset ink is a special type of ink used in offset printing that cures (dries) when exposed to ultraviolet (UV) light. This is different from traditional offset inks which dry through evaporation.