We, DLH VIETNAM JSC, are pleased to introduce as one of leading lime manufacturers in Vietnam, complied with ISO 9001:2015, Certificate No. 721541. 
As the quality control of the products is considered as the top important factor at our plant, We have our own laboratories at all factories to strictly control the quality of products. Including two test processes: 
-At mines, we test limestone samples, if they are qualified, they will be transported to the lime kilns. 
-After burning, we continue to test finished products, if they are qualified, they will be packed for delivery to the customer.