lca of the persian carpet by majid aliakbarian

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Persian Carpet, the oldest carpet discovered in the world. Its beautiful, durable, green and environmental friendly.


  • Hand-woven Persian Carpets A Life Cycle Assessment (LCA) Majid ALIAKBARIAN University of Dallas, Spring 2014 Special Thanks to Aboozar Jameh for his valuable input
  • History In 1949 during an archaeological excavation in the Pazyryk Valley in Siberia the oldest known surviving Persian carpet was discovered. Radiocarbon testing indicated that the carpet was woven in the 5th century BC.
  • History of Hand woven Carpet Persian Carpet are the oldest carpets in history. It is estimated that Persian carpet has a 3500 years of history.
  • Carpet producing countries on map The manufacturing of handmade carpets mainly takes place on the indicated areas on the map (dark green).
  • LCA Overview Life Cycle Assessment (LCA) is a "cradle-to-grave" approach for assessing industrial systems. "Cradle-to- grave" begins with the gathering of raw materials from the earth to create the product and ends at the point when all materials are returned to the earth. The goal of life cycle assessment (LCA) is to: Quantify or otherwise characterize all the inputs and outputs over a products life span Specify the potential environmental impacts of these material flows Consider alternative approaches that change those impacts for the better.
  • Benefits of LCA Identify the whole environmental impact picture Go beyond just the product use phase Quantify environmental effects such as overall energy consumption or air emissions Recognize inefficient or significant changes in the life cycle phases Compare alternatives apples to apples Reduce overall environmental impact and costs.
  • Challenges to LCA Defining LCA boundaries and scope Where do I want to draw the line? What attributes am I interested in comparing against one another? How far down the chain do I want to identify and quantify these material flows, and is that data even available? Data availability Is data available to quantify material inputs and outputs at all stages of my defined scope? Is this data from a direct source (ex.., manufacturer)? Quantifying environmental impacts How can these material flows be quantified into environmental categories (e.g., global warming)? Weighting impacts across stakeholders What environmental category are we most concerned about (ex.., acidification, global warming, energy use) and how does it compare to other environmental attributes?
  • Life Cycle Assessment (LCA) Overview
  • Materials Wool, Kork, Cotton, Silk and Natural (or chemical) dyes are the materials used in Persian carpets. Usually, a combination of wool cotton and silk is used for weaving Persian carpets. Cotton is frequently used for the foundation. Silk carpets are more expensive. Fine Persian rugs tend to increase in value with age.
  • Production Tools Loom: a loom is the device used to weave the carpet. The main function of loom is to hold the warp threads under tension to facilitate the interweaving of the weft threads. The precise shape of the loom and its mechanics has not changed significantly over centuries.
  • Production Tools (Continued) A weaver needs a knife for cutting the yarn as the knots are tied; a comb-like instrument for packing down the wefts; a pair of shears for trimming the pile; a hook to tie the knots which lets the weavers produce very fine rugs, as their fingers alone are too thick to do the job.
  • Production Technique Knot: The symmetrical Turkish and asymmetrical Persian knots are used in Persian carpets. The generally more accurate Persian knot is used for finer rugs. The knot count of a rug varies from 16 to 800 knots per square inch and the weaving process takes from a few months to several years depending on quality and size.
  • From Wool to Yarn
  • From Sheep to Carpet
  • From loom to retailer
  • Main carpet importing countries North America: USA and Canada Europe: Germany, Italy, Swiss, England, France and Austria Asia: Japan and UAE
  • U.S. Department of Commerce: Statistics show 2010 imports of rugs and carpets rose significantly. Country 2010 2009 % Change India $250.18 $216.52 15.50% China $87.74 $82.34 6.50% Iran $71.40 $43.42 6.40% Pakistan $51.21 $56.45 -9% Turkey $22.49 $22.69 -1% Nepal $18.63 $21.22 -12% Thailand $15.07 $15.89 -5% Wool rug and carpet export to U.S.A (Millions)
  • Largest Persian Carpet in the world The world's largest hand-woven carpet World Palace has been designed by an Iranian artist on the order of King of Oman. The carpet was unveiled in Tehran, Iran in 2007.