what do you mean for true density?
True density to the hollow microspheres refers to the mass per volume covering spheric wall and its hollow space. This density is also called 'effective particle density' or 'specific gravity'. We test this density by Pychnometer using nitrogen gas at a low pressure of 17psi. Under which the nitrogen gas would penetrate into the spheres with faults. In general, the more faults the spheres contains the higher the true density they would possess.
what is your nearest sea port?
our manufacturing facility is 120km from Xin Gang port, Tianjin. where we load our orders on board vessel and ship them all around the world.
what is your lead time when we place an order?
normally we start shipping orders in two to four weeks' time.
do you provide sample for evaluation?
yes. we do. we provide complimentary sample of less than 1 liter in volume. please contact us for samples larger than this.