Case Study: How a Glass Yogurt Jar Supplier Improved Glass Clarity for UK Brands

Client Background

One of the popular dairy firms in the United Kingdom was in need of a professional glass yogurt jar supplier to enhance the image of its high-end organic yogurt product range. The brand desired crystal-clear packaging which could be more effective in displaying fruit layers and natural textures. They designed 150ml straight side glass yogurt jars with a flat seal top, thick and clear base and smooth and cylindrical sides that will fit the foil lids and snap-on caps. Upon conducting a thorough assessment of several manufacturers, they settled in Minghang because of excellent management of raw materials, technology of melting as well as constant transparency in the manufacture of high-flint glasses.

Challenge

Finished Jar Slight Cloudiness

The early testing of production indicated light haze in some scenarios, which impacted shelf display with the supermarket LED lighting.

Sidewall Micro-Bubbles

In certain batches there were random micro-bubbles that made the visual imperfections that did not correspond with the premium placement of the brand.

Cause Analysis

The lab examination and furnace tests were carried out by our technical team, and the two main causes are found:

• No optical transparency was achieved due to minimal impurities in the silica mixture.
• Irregularity in the temperature distribution furnace resulted in incongruent melting, which resulted in the formation of micro-bubbles.

Solution

Raw Material Upgrade

With the experience of being a glass yogurt jar supplier, we optimized the process of sourcing the raw material, maximized silica purity, and optimized the batch formulation to make the glass more transparent.

Optimization of Furnace and Refining

Zones of furnace temperatures were stabilized and refining time was increased until no gases were trapped and so the formation of bubbles was greatly reduced.

Improved Quality Inspection

Further testing of light transmission and eye observations under the conditions of simulated retail lighting were implemented to guarantee that all batches were of clarity.

Custom 100ml 150ml 200ml Small Yogurt Jars	Custom 100ml 200ml 300ml Yogurt Glass Containers

Result

Transparency of glass was greatly enhanced and defects in the form of micro bubbles were minimized to zero. The UK brand managed to reposition its organic yogurt range to the new shelf appeal and the enhanced perception of consumers. The client also struggled to produce high quality optics and ensure stability in production of high quality dairy packaging with Minghang as its long-term glass yogurt jar suppliers.