Author Archives: admin

3 interesting Statistic Distribution

Statistic modelling is always an interesting topic which describes the many phenomenons.  Normal Distribution is a well-known distribution to many of us.  However, I would like to introduce another 2 important statistic distribution in this article. 6-sigma methodology is a quality management tool which very popular in the manufacturing environment.  Effort and preventing actions have […]

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More about PVA Sponge Cleanliness

PVA Sponge Cleanliness Spec

We know that PVA sponge roller is the commodity for the cleaning process, but how could we determine the sponge roller cleanliness?  A contaminated sponge roller may not only unable to clean-up the substrate surface but also contaminated the cleaning process.  This is the reason why only quality sponge roller could be used in the […]

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Why Bother in LPC Data for PVA Sponge Roller

LPC(Liquid Particle Count) is used to understand the particle distribution within a volume of water.  Under these circumstances, engineer applies a similar technique to loosen the particle on the substrate and understand the particle distribution which distributed on the substrate surface. Base on above, cleaning process engineer apply LPC measurement to understand the loosen particle […]

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Detrimental Effect for Non-uniform PVA Pore Size

PVA Pore Morphology

PVA Foaming is the important process for making a quality PVA sponge.  In earlier article, we had discussed the parameters which affected the foaming process, furthermore, we also talked about the importance for maintaining a uniform pore size and pore structure.  In this article, we are going to reveal the detrimental effect due to non-uniform […]

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PVA Sponge Pore Structure

PVA Pore Morphology

In last article, the PVA sponge foaming know-how, we had discussed the pore morphology is affecting by the foaming process.  We want to talk about the pore structure so that our reader could have better understanding sponge properties. Sponge Properties – Pore Structure PVA sponge is porous material which constructed by pore structure.  There are […]

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About PVA Foaming Know-How

PVA Sponge Pore Morphology

PVA sponge is an open pore structure hence the porosity is an important criterion to determine a sponge quality.  Hence, a quality PVA sponge roller always requires a good control for pore foaming process.  During the foaming process, the PVA raw material shall be reacted with formaldehyde in various process temperature and time in order […]

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What is Metal Rust

Metal rust stain is definitely one of the tedious challenging contaminate which many users are facing.  Many studies have proven that rust will deteriorate the metal properties exponentially.  In order to prolong the metal life span, user has to apply many difference coating to protect the metal being oxidizing. In DST, we have encountered many […]

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How to Remove the Rusty Cable Surface for Tsing Ma Bridge in Hong Kong

There are several famous bridges in Asia, among those; I really admire Tsing Ma Bridge in Hong Kong.  After the year 1997, with the new launch of Hong Kong Chek Lap Kok airport, the Tsing Ma bridge comes into my knowledge. In Malaysia, we always talk about the Penang Bridge, the bridge which inauguration in […]

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Rust Dissolver

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Understand Further Colour Dye PVA Sponge

We had revealed our understanding of colour dye PVA sponge with our user.  Meanwhile, we also review the methodology for removing the colour dye or colorant inherent in a solution.  In this article, we would like to talk about the PVA sponge status after it being dye with colour. As we discuss earlier, the porous […]

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