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Examinationmethods

Compliance work

Compliance status
The compliance status is a summary evaluation of the available information for food law assessment of the specified article and points out any open issues of compliance work.

specific migration (SML)/ NIAS- Screening/ Single substance analyses/ GC- MS- analysis

SML (specific migration limit) analysis of individual substances for compliance assessment
Quantitative analysis of substances with limits (SML, SML(T), QM, QMA etc.) or non-evaluated substances by gas chromatography (e. g. HS-GC, GC/MS), liquid chromatography (e. g. HPLC/MS), mass spectrometry with inductively coupled plasma (ICP-MS) in food simulants or foodstuffs after migration or (residual) content determination in the material or article.

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Overall migration (OML), Sensory analysis, colour fastness, microbiology

Overall migration acc. Reg. (EU) No 10/2011 standard test conditions (OM 0 - OM 7)
Regulation (EU) No. 10/2011 (PIM)/DIN EN 1186 classical food simulants for all filling goods (no alternative tests like Isooctane testing): A = Ethanol 10 % (v/v), B = Acetic acid 3 % (w/v), C= Ethanol 20 % (v/v), D1 = Ethanol 50 % (v/v), D2 = Vegetable oil, E = poly(2,6-diphenyl-p-phenylene oxide) (Tenax ®)

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Expert opinions and assessments (e.g. damage analyses), custom tests

Damage analysis/examination of complaints
In many cases, it is not immediately obvious which kind of tests are necessary and reasonable for clarification. Furthermore, test results which are available in short time are often helpful for further decisions. Our “diagnostic concept” provides the agreement of a limited budget (normally 700,- up to 1.000,- Euro) for the screening and evaluation of information already available as well as the realisation and assessment of first tests according to an agreed schedule. The result is a more detailed view of the damage, possible solutions and indications for additional and reasonable investigations and researches are given. You will receive first reliable test results and an appropriate documentation of the current situation at short notice and at a fixed price. Information on the frequency of damage, time of detection, technical information such as material structure or test results already known are helpful for a successful processing as experience has shown. If available, please send us reference samples, data sheets, specifications.

Mechanical/ technological properties

Determination of thickness of plastic films, aluminium foils, plane multilayer-materials and sheets
Determination by mechanical scanning (accredited test method)

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Weathering test/lightfastness - artificial irradiation in the laboratory device/UV test
DIN EN ISO 4892-2; with filtered xenon arc lamp, sample area max. 240 x 400 mm²); with water sprinkling (water spray) or dry. It is also possible to determine the light fastness, e.g. of printing inks or dyed materials, according to the so-called wool scale (light fastness scale according to DIN ISO 12040 fastness level 1-8).

Dimensions and repeating patterns on pouches, bags etc.
Dimensions like width, length, side gusset depth on bags, reels, packagings, repeat measurements, with calibrated metal measuring stick n = 5

Storage test/accelerated ageing in lab drying oven or refrigerator (controlled temperature)
Storage tests with or without filling good for estimating the long-term stability of materials and packages. The storage tests, depending on the requirements, could be carried out in lab drying oven (convection), refrigerator, explosion-protected heating chamber (e. g. solvent-based media, T1 - T3 max. 105 °C; T 4 max. 70 °C), climate chamber (humidity and temperature controlled, temperature and humidity cycles possible). Please select the appropriate method to avoid unnecessary costs. Tests according to this method serve to accelerate the estimation of material ageing, e.g. also with regard to resistance to chemicals, foodstuffs or other filling materials for long-term applications. This is an assessment of purely technical aspects. For the assessment of food law conformity, please refer to the relevant legal regulations. For initial sampling, we strongly recommend parallel testing under real storage conditions to validate the validity of accelerated ageing tests. To prepare an offer, we need the following details/information: What type of packaging is to be tested (size, filling volume)? How many packages are to be stored? Are the packages empty or do they have to be emptied before testing? What kind of filling material is involved (CAS No./Safety Data Sheet)? How long should the packages be stored? Under which ambient conditions should the packages be stored (temperature, controlled relative humidity)?

Curling or flatness
The curling of sheet materials depends generally on temperature and conditioning state. So multilayer materials made of materials having different coefficients of thermal expansion or unequal expansion/shrinkage due to deviating hygroscopic tendency may tend to curl caused by a kind of bi-metall effect. In addition to that excessive mechanical stress in the processing of rolls can lead ot curling.

Fat permeability/fat density
Testing of paper, coated paper or plastic films with dyed palm kernel fat. The sample is coated with the test fat on the test side, then the glass plate and, if necessary, additional weights are placed on top. After the exposure time has elapsed, the fat passages with a size of up to 1 mm visible to the naked eye on the display paper within the defined test area are evaluated. If only fat penetrations up to 1.0 mm are observed, the test is considered to have been passed; in the case of fat penetrations with a size above 1 mm, the test is to be carried out under a more moderate test condition (a "worse" fat permeability group).

Blocking test/blocking strength
Testing the blocking tendency of plane packaging materials, in dependence on temperature T [°C], pressure p [MPa] and time t [h]. The evaluation is carried out either by manual test or by determining of blocking force Fmax [N] in a shear test using a tensile tester. If the sample is to be tested under several conditions, please create the test accordingly several times with the respective parameter settings.

Material analysis

Microtome section/ cross-sectional image
Cross section of films, moulded forms, sealed seams etc., thickness determination of visible layers included,with reflected or transmitted light microscope (accredited test method).

optical tests

Gloss measurement
Reflectometer measurement to determine the degree of gloss. The measuring angle depends on the surface of the sample (measuring angle: high glossy: 20°, medium glossy: 60°, matt glossy: 85°).

permeation

Oxygen transmission rate (OTR) of plastic films, laminates, coated papers, Alufoils, etc.
Coulombmetric (oxygen specific) carrier gas method Method (Ametek/ Mocon). Usually deviating from the standard as a double determination

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News & blog

27Apr2023 Fünf Interviews vom 20. Inno-Meeting 2023

Hören Sie heute einen Zusammenschnitt von fünf Interviews mit Referenten im Rahmen des 20. Inno-Meeting 2023 in Osnabrück. Die Aufnahmen sind im Februar 2023 entstanden und hier zusammengeführt. Es beginnt Dr. Thomas Lehnen von Siegwerk Druckfarben. Sein Titel lautet:Wasserbasierter Inkjetdruck...

22Mar2023 Experten-Treff 2023: Barriere-Verbundfolien

Die Innoform Coaching GbR und das Süddeutsche Kunststoff-Zentrum (SKZ) laden zum Experten-Treff 2023 Barriere-Verbundfolien ein. Die zweitägige Veranstaltung findet am 22./23. Juni 2023 in Würzburg statt. Treffen Sie Branchenteilnehmer aus dem deutschsprachigen Raum vor Ort oder online, denn...

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Events

Webseminar: Sealing layers and sealing properties PE & PP - Basics for packaging films, part G Wednesday, 07. June 2023

Talk: Mono Material Flexpack Solutions Friday, 15. September 2023

Seminar: Grundlagen der Kunststoff-Verpackungsfolien - Unser Bestseller Tuesday, 05. / Wednesday, 06. December 2023

Videokurs: Basic knowledge 3: Packaging: the final stage - packing Thursday, 03. January 2030

Videokurs: Basiswissen 3: Verpackung: Die letzte Stufe - Abpacken Thursday, 03. January 2030

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