Quality Control

Our manufacturing experience can help the customers to solve all kinds of problem of bottle liquid leakage.

Quality Control

The containers are made of soda-lime glass, complying with the green environmental protection label, no environmental pollution, recyclable, and the content of lead and cadmium meet the US FDA standards. All Raw Materials used in the nail polish bottles are compliant with SGS certificates. GH Plastic will check the products such as glass bottles, plastic caps and brushes prior to shipping, the final products will not be shipped out until inspector has done the checking list.
Bottles, caps, and brushes are packed separately in the cartons and all the cartons are packed on the pallets for shipping safety.

We offer extra quantity of bottles, caps, and brushes as spare parts in each shipment. The extra quantities are for replacement in case any damaged or broken bottles caused during transportation.


Nail Polish Bottles, Caps, and Brushes QC Flow Chart
Raw Material Incoming Check

PP or PE suppliers will provide the test report for each batch of incoming raw materials.

Cap Checking on Production

The plastic caps are produced by automatic injection machine equipped with computer and auto arm. All the production parameters are set by the computer. We check the caps on the conveyor after the auto arm picked up the plastic caps from the mold and placed them on the conveyor. The NG caps will be put in the mixer for re-production. The qualified caps are going down to the basket slowly to avoid scratch among the plastic caps before packaging.

Caps Packaging Checking

The qualified caps are put in the polybag in the basket for packaging. 500 pcs of caps are packed in a polybag and 8 or 10 bags are in a carton, after bags are weighed and sealed. The product label with part number, quantity, and production date will be put on each carton.

Assembled Plastic Caps and Brushes

We can fit the brush into the plastic cap by tool machine for the customer (optional). The attached caps and brushes are placed on trays after visual inspection.

Brush Checking

The brushes are produced by automatic machine. All the production parameters are set by the computer. The brushes are visual inspected on the baskets or trays. 1000 pcs of brushes are packed in a polybag and 10 or 15 bags are packed in a carton, after bags are weighed and sealed. The product label with part number, quantity, and production date will be put on each carton.

Glass Bottles Checking on Production Process

Glass bottles are produced by the molds on automatic machine. All the production parameters are set by the computer. The glass bottles are visual inspected on process, before packed in the carton with partitions. The COA report will be provided by the glass factory, and we will inspect the bottles again before shipment.

Checking the Bottle Dimensions by Meter
NG Bottles

We sort out the NG bottles like bottles with black spot, crack, bubble, scratch line on bottle surface, bottle neck not straight, or bottles with burr, etc. We put the NG bottles in the bag and send them back to the glass factories.

Bottle Packaging Process

The glass bottles are packed on wrap trays, or in the carton with partitions or cross partitions, and all the cartons of glass bottles, plastic caps, and brushes are put on the pallets for shipment.

GH Plastic is a professional manufacturer of high quality nail polish bottles, plastic caps and brushes.

Based in Taiwan, GH Plastic Manufacturing Co., Ltd. is a supplier and manufacturer of nail polish glass bottles, caps, brushes and droppers, since 2004.

Nail polish glass bottles with different neck sizes and shapes. 1,600 square meter one-stop and robot arm manufacturing center, accepts small orders, fast delivery, and beautiful packaging for bottles, caps, droppers and brushes. GH Plastic exports 80% of nail polish products globally, including 2.5ml-50ml nail polish and UV gel polish glass bottles, and 5ml-250ml pharmaceutical essential oil bottles and its accessories.

GH Plastic has been offering customers high-quality nail polish bottles, caps, droppers and brushes, both with advanced technology and 30 years of experience, GH Plastic ensures each customer's demands are met.