Company printing workshop clean level as 100000 standard The maximum allowable number of dust particles (per cubic meter): large or equal to 0.5 microns, the number of particles shall not exceed 100,000, the number of particles larger or equal to 5 microns shall not exceed 20,000, the temperature should be maintained at 18 ~ 26 ℃, humidity should be maintained 40 ~ 80% cleanliness level lurking The maximum allowable number of particles / cubic meter The maximum allowable dust falling ≥0.5чm ≥5чm Planktonic bacteria / cubic meter Settling bacteria / cubic meter.