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Quality and ecology

High quality raw materials

We purchase only certified raw materials for the production of pocket spring units, high and low carbon wire. Each supplier‘s raw material is tested inhouse and, if in doubt, sent to independend laboratories for quality check (chemical and mechanical). Raw material suppliers are chosen carefully and long term cooperation is continued only with the trustwothy ones.

In-house testing

Having our own laboratory allows us to manufacture top-quality products based on the individual needs of our customers and keep up the good quality of our products, be it high, low carbon wire or pocket units.

Pocket units quality testing:

  • Stage 1. Coils geometry, spring rate and pre-load are being checked/tested as soon as they come out of the coiler;
  • Stage 2. HOP and HIP are being tested at the coiler as well as out of the assembler.
  • Stage 3. Measures already manufactured unit (width length, height).
  • Stage 4: Testing unit comfort level, if zoned- zonal comfort levels.
  • Stage 5: Units is compressed and roll packed, stacked on pallet, one out of 100 from compressed and roll packed units is taked for a random quality check.

*We can tailor products to your individual requirements on the basis of the samples or accurate data provided.

High/Low carbon wire

Whilst manufacturing each order strict quality check is a part of production process. Litspringas’s quality department guarantees:

  • Geometry check (i.e. wire tollerances);
  • Surface check (for any residues and surface cleanliness);
  • Mechanical check (for 3 random wire end’s of each PO);
  • Chemical check (only for raw materials);
  • Packaging check (type of winding, neat winding, type of packaging according to client’s request);


Testing of rebar in coils is performed in accordance with national and international standards, as well as Quality Management Systems ISO:15630-1 and ISO:6892-1, for the following:

  • Reinforcement density inspection;
  • Mechanical performance inspection (we test 3 rebar ends from a coil produced for every purchase order);
  • Marketability inspection;
  • Tensile strength testing of rebar steel (rebar is bent at 135 degrees, then heated at 100 degrees for 60 minutes, then bent again at 157,5 degrees and inspected for cracks or tears);
  • Inspection of chemical properties (we verify the composition of the raw material and its compliance with relevant documentation);
  • Packaging inspection (type and quality of packaging, compliance with customer requirements).
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Our pocket units are recycable – they are made of raw materials such as high carbon wire, non-woven material, paper and hot - melt adhesives. Throuhout all the warehouses and administrative premises only green energy (from re-newable sources),supporting environmentally friendly bussiness intension.

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