Ironing and Pressing School Slacks: Guide for Poly-Viscose Fabric

A sharp, well-pressed pair of school slacks makes an immediate impression — crisp crease lines, smooth fabric surface, and a professional finish that holds through the school day. For SONY Selex school slacks, which are made from poly-viscose (65% polyester, 35% viscose), correct ironing technique is important both for appearance and for fabric longevity. This guide covers everything — from iron temperature settings to crease formation, steam usage, and how to avoid the most common ironing mistakes that damage poly-viscose fabric.

Understanding Poly-Viscose Before You Iron

Poly-viscose is a blended fabric with different heat tolerances for each component. Polyester has a relatively low melting point — excessive heat will cause it to glaze (develop a permanent shiny patch) or even melt in extreme cases. Viscose is more heat-tolerant but susceptible to watermarking if steam is applied unevenly on dry fabric.

Safe ironing temperature for poly-viscose: Medium heat — equivalent to the cotton setting on most irons, but one step lower. On a typical iron dial, this is the two-dot (●●) setting. Avoid the three-dot (●●●) high heat setting entirely. Use a pressing cloth at all times.

Steam: Light steam is beneficial for poly-viscose ironing. It relaxes the fibres and helps set the crease. However, excess steam — particularly dripping water — can leave water marks on viscose-heavy blends. Use the steam function on the lowest effective setting and keep the iron moving.

What You Will Need

• Steam iron (preferably with adjustable temperature and steam control)
• Pressing cloth — a clean cotton or linen cloth placed between the iron and the slacks. This is non-negotiable with poly-viscose.
• Ironing board with a firm, flat surface
• Spray bottle with water (optional, for dampening)
• Trouser press or hanger for storing after ironing (to maintain the crease)

Step-by-Step Ironing Process

Step 1 — Turn inside out: Always iron poly-viscose school slacks inside out initially. This protects the outer surface from direct iron contact and prevents glazing of the outer weave.

Step 2 — Set iron temperature: Medium heat (two dots). Allow the iron to fully reach temperature before starting — an iron that is still heating up can have inconsistent surface temperatures that cause uneven pressing.

Step 3 — Iron the waistband and pockets: Start with the waistband (lying flat on the ironing board) using the pressing cloth. Iron pocket areas flat, ensuring no pocket edge impressions are left on the outer fabric.

Step 4 — Iron the legs: Lay the slacks with one leg on top of the other, aligning the inseams. The outer crease (centre front of the leg) should fall naturally at the fold line. Place the pressing cloth over the leg and iron the front crease first — apply firm pressure with light steam to set the crease. Then iron the back of the leg.

Step 5 — Turn right side out: Repeat the leg ironing process on the right side, always using the pressing cloth. Keep the crease lines aligned precisely.

Step 6 — Final crease setting: For a sharp, long-lasting crease, apply a final pass with firm pressure and light steam to both crease lines. Some parents use a thin cloth dampened with water mixed with a small amount of starch (rice water) to further set the crease — this works well with poly-viscose.

Maintaining the Crease Between Ironings

A well-pressed crease on poly-viscose slacks can last 2–3 wears before re-ironing if the slacks are stored correctly. After ironing:

• Hang immediately on a trouser hanger (the type with clamps at each leg) to prevent new creases forming.
• Do not fold ironed slacks over a rail — this creates a horizontal crease across the front of the leg.
• If folding is unavoidable, fold along the pressed crease line only.
• Avoid stuffing slacks into a school bag unfolded — the resulting crumpling undoes a good press immediately.

Common Ironing Mistakes and How to Fix Them

Shiny patches (glazing): Caused by ironing without a pressing cloth or using too high a temperature. Minor glazing on the inside of the slacks is mostly invisible. Glazing on the outer surface is permanent on polyester-heavy blends — prevent by always using a pressing cloth.

Water marks: Caused by uneven steam or dripping water on dry viscose fabric. To remove light watermarks, dampen the entire affected area evenly with a spray bottle, then re-iron lightly with the pressing cloth to dry evenly.

Double creases: Occurs when the leg is not aligned precisely before ironing. The crease forms in the wrong position, or two creases appear side by side. Correct by dampening the affected area, aligning legs precisely, and re-pressing with firm pressure to overwrite the old crease.

SONY Selex school slacks use pre-shrunk poly-viscose fabric that holds a crease well and is designed for regular school use. For bulk and wholesale enquiries, contact Vinod Hosiery Factory (VHF) on WhatsApp at 9582245320. Also see our complete uniform care guide and alteration guide for retailers.