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Quality Assessment

Nisshin Yoki maintains a high level reuse system that produces a high level of quality and stability using thorough quality management. This is also shown by the acquisition of the industry first quality management ISO9001 certification.

Nisshin Yoki conducts various inspections and measurements in order to maintain this high level of quality.
An outline of these inspections is provided here.


Measurement of waste amounts

Open head drums

Produces less than 0.5mg by thoroughly reducing the amount of waste

Closed head drums

Maintains less than NAS class 1 by ensuring the level of cleanliness

Definition of "NAS class"
Classes of particle ratios for 100cc shown in collected samples.
NAS class comprise of 14 levels of particle ratios from 00, 0, 1, to 12 and constantly Nisshin Yoki maintains a level of less than 1.

Collected and measured waste in a clean room

Clean room1 Clean room2

Fine particle waste is collected from products taken from each lot of open head drums waiting for shipment using a 400 hole mesh net cleaner in a special cordoned off clean room.
We continuously maintain a high level reuse system by ensuring a level that greatly exceeds the expectations of customers at less than 0.5mg per drum can using a special electronic scale to strictly measure these drum cans.

Splash Measures

Although Nisshin Yoki constantly maintains a clean environment in its plants, we conduct periodical inspections each year in order to raise the level of container completeness during the recycling process.
We call this "Splash Text"

We want to provide the highest quality of recycled containers by paying attention from start to finish within the plant.
And we conduct inspections in this manner.

Splash Test Procedures

  • Clean room 1
    Investigate all areas in the plant, including products, and investigate whether or not there are any substances such as silicon that cause splashes.
  • Clean room 2
    Apply paint to special ply board as a sample on the product side
  • Clean room 3
    Collected substances are splashed on paint sample and we check whether the substance causes the paint to splash..
  • Clean room 4
    After checking whether the paint splashes, we dry the substance and check.
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