LABORATORY REPORT

Document Identification

QC-2025-12-16-TS

Quality Control Department

Testing Report

Subject

Testing of tinplate from Belgian supplier INDUMET Belgium, TATA STEEL for the production of drawn cans

Location

Quality Control Lab, Industrial Zone

Date of Issue

December 16, 2025

Attendees

Željko Selenić, Srđan Prodanović, Milica Rajković, Biljana Puzović

On September 18, 2025, tinplate from the Belgian supplier INDUMET arrived at the factory. Specifications: TPS TH550 2.0/2.0 dimensions 0.165x910x886, intended for the production of drawn cans. The tinplate testing process took place in the following phases:

1 Incoming inspection of tinplate
2 External analysis of tinplate
3 Lacquering process

4 Printing phase
5 Production of drawn cans
6 Testing of final cans

1. Incoming Inspection

The received tinplate was properly delivered, packed, and protected. There is no mechanical damage to the packaging. A quantity of 1500 sheets arrived. The obtained results are shown in Table 1.

Table 1. Incoming inspection of tinplate

Coil Number	Sample	Temper	Dimensions	Plate Thickness	Tin Coating	Hardness (HR)
091291797001 2.0/2.0	1500 sheets	TH 550	0.165x910x886 TPS	0.165-0.166	2.0/2.04 2.12/2.08	73.5-73.0

Analysis Continuation

Document Identification

QC-2025-12-16-TS

2. External Analysis of Tinplate

Table 2. Values for Tin and Chrome Coating

Sample Area	Free Tin (g/m²)	Alloy Tin (g/m²)	Total Tin (g/m²)	Chrome Coating (mg/m²)
1. (Top)	0.93 / 1.11 / 0.93	0.9 / 0.86 / 0.85	1.83 / 1.97 / 1.78	3.2
1. (Bottom)	0.88 / 0.85 / 0.88	0.88 / 0.9 / 0.88	1.76 / 1.75 / 1.76	3.0

3. Lacquering Procedure

Table 4. Lacquering Parameters (from production record)

Operation	Lacquer Code	Wet Coating [g/sheet]	Temperature by Zones [°C]	Speed (sh/h)
Pre-press preparation	Stamping (Štanc) 818964	17 g/sh	185-193-190	5000-5300
printing
Protective lacquering	Silver 815766	12 g/sh	155-163-160	5000-5300
Internal lacquering	Alu lacquer 816123	10 g/sh	195-203-200	5000-5300
Internal lacquering	Alu lacquer 816123	10 g/sh	195-203-200	5000-5300

The required tin coating was 2.0/2.0 g/m², and according to the standard, the minimum allowed values for that coating are 1.6 g/m². In Table 2, it can be seen that the values for the tested sample are lower than the minimum (0.88 / 1.11).

Final Findings

Document Identification

QC-2025-12-16-TS

4. Printing & Production

Printing was done on a Planeta printing machine. Testing conducted during production of: "Potted Meat (Mesni narezak) 150g Carnex".

6. Final Testing & Images

Click to upload Adhesion Test Evidence

Figure 1. Adhesion Control Evidence

Click to upload Hydrolysis Result Evidence

Figure 2. Hydrolysis test result

Prepared by:

Milica Rajković / Željko Selenić

Date of Completion:

01.02.2026.

Authorized Seal & Signature:

Quality Manager Office