Textile Testing - Seam Slippage
Seam Slippage is one of four key topics (others include Abrasion Resistance, Pilling, and Colourfastness) that we are covering to provide some background as to how we test and why.
Test results provide us with critical information about textile’s durability and suitability for certain applications. We externally test all James Dunlop and Mokum textiles in Melbourne at a highly reputable laboratory who are amongst the most conservative and stringent in the world, due to the extremely harsh environmental conditions we face here in Australia and New Zealand.
We have gathered a number of frequently asked questions relating to seam slippage, so we asked our Mokum Studio designers Stephanie Moffitt and Annie Moir to share their expert knowledge.
Seam slippage is another equally important upholstery test, can you explain what seam slippage actually means?
Seam slippage is the separation or pulling apart of yarns in a fabric usually along a sewn seam or join. More often than not, the yarns don’t actually break they just separate and leave an unsightly gap along the fabric join.
What are the most common causes for seam slippage?
Seam slippage may be the result of a poorly constructed textile and /or the use of defective yarns in the fabric. But more commonly it is due to an inadequate standard of upholstery manufacturing i.e. a display of insufficient seam allowance, a deficient number of stitches in the seam or failure to overlock raw edges during the upholstery process – or a combination of all three factors.
Seam slippage usually occurs on joins that are subjected to heavy load and pressure such as seat cushions and arm rests. Certain furniture styles put more stress on fabric seams such as tub chairs and furniture with a fixed back or seat cushions.
Can composition play a part in seam slippage?
Yes, it can, Linen for example is loved for being a smooth lustrous fibre, but this can make it more susceptible to seam slippage with heavy load. For some linen textiles we would recommend discussing the need for reinforcing upholstery seams with your upholstery manufacturer.
The note “reinforce upholstery seams” is sometimes listed on our sampling specifications – what does it actually mean? Should we assume the fabric is inferior quality?
Firstly, no it doesn’t infer inferior quality. If we’ve specified it as being suitable for upholstery then it is fit for purpose, but we recommend additional seam support for that particular textile.
“Reinforce upholstery seams” simply means using an additional safeguard by stitching a tape along the seam to prevent fraying in high load areas, such as the corner back cushions. Overlocking should be used for loose woven fabric and seated cushion seams.
What’s the remedy for seam slippage? Can you fix it once it starts?
It is difficult to repair seam slippage once it starts. In almost all instances of seam slippage, it will require the furniture to be recovered, or re upholstered. It’s important to ascertain the cause of the seam slippage. If the seam slippage can be identified as being a result of inadequate manufacturing, you’ll need to work with the upholsterer to ensure appropriate manufacturing techniques are being used, including reinforcing seams if required. If the seam slippage is clearly related to the fabric, the furniture would need to be recovered, either from a different batch (if it’s an isolated batch issue) or selecting an alternative fabric which is more suitable for that particular frame.
Can you explain how the seam slippage test is performed?
The test measures how resistant a fabric is to yarns opening/ slipping under pressure along a seam line. Two fabric swatches are sewn together with a standardised seam. The swatches are pulled apart with an equal and opposite force. The test is performed in both warp and weft directions. Any seam opening is then measured while the fabric swatches are being pulled apart. According to the Australian standard, a seam opening should be less than 6mm at maximum force. A lower result indicates a smaller opening and thus a better resistance against seam slippage.
Written by: jamesdunloptextiles.com...
National average asking price virtually unchanged for over a year
Since January 2023, the national average asking price has remained stable. At $868,877, it is down a marginal 0.6% on April last year. The national average asking price has remained below $900,000 since December 2022, a significant decrease from the market peak in January 2022 when it exceeded $1 million.
“As we move into the winter months, we typically see a cooling market, and in 2024, this is combined with a softening economy. It will be interesting to see how these factors play out for the property market in the coming months,” says Sarah Wood, CEO of realestate.co.nz
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ANZAC DAY
Half a world away from dawn services in Australia & New Zealand, a small group of dignitaries will meet in Malta this Anzac Day among the neat rows of headstones at sun-baked Pieta Military Cemetery just outside Valletta – as they have since 1916 – to commemorate a moving but largely forgotten chapter of Gallipoli lore.
It is the story of how a tiny, ancient, impoverished and battle-scarred nation in the centre of the Mediterranean opened its arms and hearts to care for thousands of wounded, traumatised and sick young Anzacs, many of them still teenagers, who arrived aboard a flotilla of blood-soaked hospital ships from the battlefields of Gallipoli.
While most of the 57,950 soldiers evacuated to Malta recovered and eventually left, some 202 Australians and 72 New Zealanders did not, and are in war cemeteries across the archipelago.
Apart from their graves hewn from the parched, rocky Maltese earth, there is little other physical evidence the Anzacs were ever in Malta, despite the enormity of their presence over a century ago.
The voyage across the Eastern Mediterranean in these makeshift hospital ships from the Gallipoli Peninsula to Malta was not an easy one. It took the steam ships up to eight days to cover the 1163-kilometre journey.
At the beginning of April 1915, there were 824 military hospital beds in Malta. At the end of May 1915, there were more than 6000 in 14 hospitals spread all over the island. At its peak there were 25,522 beds in 28 hospitals, with the highest number of patients on any one day a staggering 16,004.
We will remember them 🥀 🌺
(article written by Andrew Hornery a senior journalist and former Private Sydney columnist for The Sydney Morning Herald).
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