Introduction
Table of Contents
ToggleLooking for IML phone cases that strike a balance between complex design, durability, and compliance? You are not alone. As a purchasing manager for a US/EU brand, you are confronted with fragmented suppliers and ever-growing ESG demands.
This case study reveals how purchasers collaborated with YG, a leading phone case manufacturer China, to overcome these obstacles.
1. The main challenges in purchasing IML solutions
- Design limitations hinder innovation. Traditional printing cannot achieve high-resolution gradients or 3D effects on IML-covered surfaces. This forces you to make compromises aesthetically.
- The fragmentation of the supply chain increases risks. Coordinating molds, injection molding, and printing among multiple suppliers can delay delivery by more than 60 days. Communication interruption led to a 12% defect rate.
- The pressure of compliance keeps escalating. The EU REACH regulation requires material traceability. Internal phone case components that do not meet the standards can lead to costly recalls.
2. How does YG’s IML solution address your pain points
A. Unlock design freedom and speed
More than 30 designers from YG offer free 3D modeling for your concepts. They used multiple design software to achieve 100% design accuracy on the curved IML housing surface—no more compromise.

Phone case design
The prototype supported by the patent shortens the development time. With over 80 R&D patents, samples can be provided within 7 days. Their DFM analysis avoids costly redesigns

Prototype
B. Streamlined supply chain control
YG is a truly one-stop phone case factory. From mold design to the final quality control, all stages are completed within the company. Our MUD mold technology reduces R&D costs by 30%, enables market launch in as fast as 10 days, increases return on investment by 50%, and shortens engineering verification and training time by 65%.
Automated production ensures consistency. Over 130 injection machines produce 300,000 IML phone cases every day. The production rate is 99.2%, minimizing waste to the greatest extent.

Injection machines
C. Strict pursuit of quality
Ecological materials meet strict standards. GRS-certified recycled plastics and solvent-free inks have passed the tests of Amazon Laboratories. Each internal phone case component complies with the reach standard.
Closed-loop QC ensures safety. The quality team of over 50 people at YG uses testing tools such as 3D coordinates, a Birefringence measuring instrument, and carton vibration to conduct inspections for ISO 13485, ISO 9001, and ISO 14001 certifications. A complete traceability report simplifies your review

3D coordinates
3. Quantifiable Results for Your Business
Metric | Before YG | With YG | Improvement |
---|---|---|---|
Cost per Unit | $3.80 | $2.60 | ↓ 31.5% |
Lead Time | 60 days | 35 days | ↓ 41.7% |
Return Rate | 12% | 1.8% | ↓ 85% |
New Product Success | 40% | 90% | ↑ 125% |
4. Customer Verification: Real-world validation
“YG’s IML technology enables us to launch gradient effect IML cover products ahead of our competitors. Their SMETA-certified factory has reduced our audit workload by 70%, which has changed the rules of ESG compliance.”
5. Why cooperate with YG on the IML case?
Our advantages:
- 45-day rapid mold development
- A 15-day mass production cycle
- JIT logistics for on-time delivery
- Material certification file
- The minimum order quantity is over 500 pieces, and the unit cost is reduced by 30%
- Including free design support
- Duty-optimized shipping from China
Your Next Step
Ready to transform your IML phone case sourcing?
Contact YG, your trusted phone case manufacturer, for a free DFM analysis today.