Screen printing,high precision,lye-developing solder mask ink

Working procedure

1. Mixing

Mixing a small amount main agent with hardener and stirring thoroughly,then mixing the mixture above with the remanent main agent,add appropriate diluent and stirring 5-10 minutes. The viscosity of ink is adjusted to 120 PS if printed by hand. And it is adjusted to 180 PS if printed by machine.It is adjusted to 200 PS if it is aluminum tamponade .The viscosity of ink mixed above is measured at 25 degrees. Please use the special diluent of our company if the viscosity of ink needs to adjust.

• Remain time

10-15 minutes after stiring uniformly

• Ordinary boards:43T;Chemical-plating Aurum or Tin boards:36T
• Pre-baking

1) Single side printing separately

First side:72-76 degrees,15-18 min

Second side:72-76 degrees,30-35 min

• Double sides printing simultaneously:72-76 degrees,40-60min

• Exposure

300-500mJ/cm2,Black ink:600-750mJ/cm2,exposure step:10-12 steps

• Developing:

Developing solution:0.8-1.2wt% Na2CO3 or K2CO3 aqueous solution

Developing solution temperature:28-32 degrees

Spray pressure:1.5-2.5kg/cm2

Developing time:40-90 seconds

• Post cure

Spray Tin board:150 degrees*(60-120min)

Chemical-plating Aurum board:150 degrees*(50-60min)

Thick copper plate,boards printed with black ink should be post-black in subsection:75 degrees*(60-120min)+100 degrees*30 min+150 degrees*(60-90min)

• Safe time

6 months since the date of manufacture,store below 25 degree in dark

• Attention:

1) Mixing the ink fully before using

2) We will offer you special diluent or PMA if the ink need dilute

3) The values above are based on experiments in our lab.Experiments need to be carried out in order to get proper using condition.

Hubei Nuojinsen Technology Co.,Ltd ,after years of unremitting efforts，Combined with foreign advanced technology and process,Production of PCB ink has reached the technical level, conforms to the requirement of RoHS environmental protection directive, with excellent quality and excellent service is deeply trusted by customers.
Company passed the ISO9001 quality standard certification and ISO 14000 environment system certification,

is the national high and new technology enterprise. Company has achieved many honors, including: the Chinese photographic society of professional committee of the radiation curing, deputy director of the unit,the ninth national committee, deputy director of the printed circuit branch of unit, the national standardization technical committee, deputy director of the unit printed circuit boards, printed circuit industry in China in the second session of "nation" brand enterprise, Hubei in 2015 advanced units of ecological construction and environmental protection, etc.Companies always adhere to the science and technology as the first productivity. Enterprise technology center in Wuhan city, the company has built in Wuhan city, and form a complete set of PCB ink research and development of engineering technology research center, two platform, and lead to make the printed circuit with marking ink and the printed circuit using resistance solder "two important industry standards. The company's flagship product, solder resist ink (solder mask)  series of products have been American UL safety certification.

The company attaches great importance to "research" development, actively carry out technical exchanges and extensive cooperation with Beijing University of Chemical Technology, Wuhan Chemical Design Institute, University of Science and Technology of China and other domestic famous universities, in early 2016, and polymer materials Wuhan University college established a joint laboratory. After years of scientific research cooperation, the company has built an independent intellectual property system. The company is equipped with advanced facilities in addition to the basic laboratory, but also to unite the doctor, master as the core, R & D capability of a strong professional and technical team.

Over the years the company to scientific management mode and improve the quality of production and management system, continuous development, and strive to open up the international market, in order to achieve broader development. The company all staff is willing to "Self-improvement, practical effectiveness" spirit of enterprise and the "quality first, customer first" business philosophy, and constantly improve the innovation, meet customer requirements, improve the competitive ability of enterprises in the domestic market.