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Hi there, I'm Jarvis! I see you're looking at the Offset Serrated Bread Knife | Allergen Safety Purple Knife | 20cm Blade | Mercer Culinary FB504. How can I help you with the technical specs or suitability for your business today?

Jarvis is an AI assistant and may occasionally provide incorrect details. To ensure your equipment fits and functions perfectly, we recommend verifying all critical specifications-including dimensions, power requirements, and compatibility-with our expert sales team prior to purchase.For orders or stock, call 0333 355 0535

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Mercer Culinary In Stock

Offset Serrated Bread Knife | Allergen Safety Purple Knife | 20cm Blade | Mercer Culinary FB504

SKU: FB504
£36.54 / exc vat
£43.85/ inc vat
  • High-Carbon Japanese Steel
  • Purple Allergen Handle
  • Offset Blade Design
  • Ergonomic Santoprene/Polypropylene Handle
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Features Overview Specifications Case Study Reviews Installation Buying Guide FAQ

Product Overview

Getting a clean, consistent slice from a crusty loaf without turning it into a pile of crumbs is one of the kitchen's simple pleasures. This is where the serrated bread knife Mercer Culinary 20cm truly shines. Designed for the relentless pace of a commercial kitchen, it combines a razor-sharp Japanese steel blade with an intelligent, ergonomic design that makes slicing effortless, from the first cut of the day to the last.

This knife is an absolute must-have for any professional kitchen that takes food safety seriously. The distinctive purple handle is part of a universal colour-coding system, instantly designating it for use with allergen-free products, particularly gluten-free bread. It’s an essential tool for bakeries, delis, cafes, and  caterers who need to prevent cross-contamination and  protect their customers, all while delivering perfectly presented food.

Featuring an offset blade to keep your knuckles clear and  a comfortable, non-slip handle, this knife is built for both performance and  safety. It’s not just a cutting tool; it’s a vital part of your kitchen's food safety protocol, providing peace of mind and  precision in one beautifully crafted package. Upgrade your prep and  safeguard your service with a knife designed for the modern professional.

Key Features and  Benefits

  • High-Carbon Japanese Steel: Stays incredibly sharp for longer, requiring less maintenance.
  • Purple Allergen Handle: Instantly signals its use for allergen-free food prep.
  • Offset Blade Design: Keeps your knuckles safely away from the cutting board.
  • Ergonomic Santoprene/Polypropylene Handle: Offers a comfortable, non-slip grip during long shifts.
  • Serrated Edge: Cuts through tough crusts without crushing the soft interior.
  • Textured Finger Points: Provides extra grip and  control for precise, safe slicing.
  • One-Piece Steel Construction: Ensures superior strength and  durability for professional use.
  • NSF Certified: Meets the highest public health and  safety standards.

Technical Specifications

  • Brand: Mercer Culinary
  • SKU: FB504
  • Dimensions: 10(H) x 30(W) x 445(D) mm
  • Blade Length: 203mm / 8"
  • Weight: 0.18 kg
  • Colour: Purple & Silver
  • Material: High-Carbon Japanese Steel, Santoprene, Polypropylene
  • Certification: NSF Certified

Expert Review and  Insights

Mercer Culinary consistently delivers tools that just work, and  the FB504 is a perfect example. It's more than just a knife; it’s a purpose-built solution. The combination of the grippy, offset handle and  the aggressive serration on the Japanese steel blade gives you immense confidence when slicing everything from dense sourdough to delicate brioche. It’s a workhorse that also ticks a critical food safety box.

Sophie Brooks – Chef Tools Expert View Profile →

  • Top-Tier Performance: The offset handle and  sharp blade make high-volume slicing comfortable and  fast.
  • Single-Purpose Design: Its purple handle dedicates it to allergens, limiting its general use.

Case Study: Real Business, Real Results

The Copper Kettle, a bustling tearoom in York, needed to enhance their allergen handling procedures to better cater to a growing number of customers with coeliac disease. Their standard knives posed a constant cross-contamination risk during busy lunch services.

"Introducing the Mercer purple handled allergen bread knife was a simple switch with a massive impact. Our team can now confidently prepare gluten-free options without hesitation. The visual cue of the purple handle makes our safety process foolproof, even during the most hectic periods."

Robert Davies – Head Chef

The change immediately improved kitchen workflow and  boosted staff confidence, leading to a 25% increase in positive online reviews mentioning their excellent allergen awareness.

Installation and  Maintenance Guide

Setting It Up

  • Upon arrival, wash the knife thoroughly with warm, soapy water before its first use.
  • Immediately designate a specific storage location for it, such as a purple magnetic rack or block, to maintain your allergen safety system.
  • Brief your team on its specific purpose: this is an allergen-only knife and  should not be used for general prep.

Keeping It Going

  • Hand-wash is strongly recommended to protect the blade's edge and  handle integrity. Avoid harsh dishwasher cycles.
  • Dry the knife immediately after washing to prevent any water spots or potential corrosion on the high-carbon steel.
  • Store it safely in a knife block, on a magnetic strip, or in a sheath to protect the blade and  prevent accidents.
  • While it holds a great edge, periodically get it sharpened by a professional who can handle serrated blades correctly.

Buying Guide: Choosing the Right Commercial Knife

Not sure which knife is right for your kitchen? Here are a few things to consider.

Blade Material Matters

Japanese steel, like that used in this knife, is known for being harder and  holding a sharper edge for longer. German steel is typically a bit softer and  more durable against chipping.

Consider the Handle

You'll be holding this for hours. An ergonomic, non-slip handle like this one reduces fatigue and  the risk of accidents during long, repetitive tasks.

Match Blade to Task

A serrated blade is essential for crusty items. A straight edge is for clean vegetable prep. A Granton edge (with divots) is for preventing meat from sticking.

The Power of Colour

Colour-coded knives, like this purple handled allergen bread knife, are a simple and  effective way to prevent cross-contamination, a key part of food safety compliance.

Full Tang for Strength

A 'full tang' means the metal from the blade runs all the way through the handle. This provides superior balance and  durability, making it ideal for tough commercial use.

See all Chefs Knives

Frequently Asked Questions

Q: Why is the handle purple?

A: Purple is the industry-standard colour for equipment used with allergen-free products, particularly gluten-free, to prevent dangerous cross-contamination.

Q: What does 'offset' mean for a knife?

A: An offset bread knife 20cm blade has a handle that is raised higher than the blade, which keeps your knuckles from hitting the cutting board as you slice.

Q: Can I put this knife in a commercial dishwasher?

A: While the materials are durable, we strongly recommend hand-washing to preserve the sharpness of the blade's edge and  the longevity of the handle.

Q: What is Japanese steel known for?

A: High-carbon Japanese steel is renowned for its ability to take and  hold an exceptionally sharp edge, making it ideal for precision cutting tasks.

Q: Is this knife suitable for both left and  right-handed users?

A: Yes, the ergonomic handle and  blade design are symmetrical, making it perfectly comfortable for both left and  right-handed chefs.

Q: What does NSF Certified mean?

A: NSF certification means the knife has been tested by a third party to meet strict public health and  safety standards for materials, design, and  construction.

Q: How do you sharpen a serrated knife?

A: Sharpening a serrated knife requires a special tool called a ceramic sharpening rod to hone the individual scallops. For best results, we recommend professional sharpening.

Q: Is this knife only for bread?

A: While it's designed as a commercial bakery serrated knife, its sharp edge is also excellent for slicing delicate items like tomatoes or large cakes, provided they fall under its allergen-specific use.

What Customers Are Saying

"Brilliant knife. Slices through our sourdough like a dream and  the offset handle is so much more comfortable than our old ones. The purple handle is great for our gluten-free station."

Sarah L. – The Bristol Loaf

"A very sharp and  reliable allergen safety kitchen knife. It's made our prep process much safer and  more efficient. A solid, well-made tool that feels like it will last for ages."

Tom Peterson – Cafe Manager, Manchester

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The Mercer Culinary Promise: Professional Grade, Peace of Mind

Choosing a Mercer Culinary tool like the FB504 bread knife is about more than just its high-quality Japanese steel or ergonomic handle. It's an investment in operational excellence and  unwavering reliability. For decades, Mercer has been a trusted partner in professional kitchens across the globe, known for creating tools that withstand the rigours of daily service without faltering. This knife isn't just a piece of equipment; it's a cornerstone of your food safety strategy. By incorporating this dedicated allergen knife into your workflow, you're not only complying with Food Standards Agency (FSA) guidelines but also building profound trust with your customers. It demonstrates a commitment to their wellbeing that goes beyond the menu, reducing risk and  solidifying your reputation as a safe, professional establishment.

Explore more from Mercer Culinary

Why an Offset Blade is a Baker's Best Friend

Ever scraped your knuckles on the chopping board when slicing a big, crusty loaf? The 'offset' design of this knife is the clever solution. The blade is dropped lower than the handle, which elevates your hand completely above the cutting surface. Think of it like a miniature step-stool for your hand; it gives you the clearance you need to slice all the way through the bottom crust without your fingers getting in the way. This not only makes the job more comfortable but gives you better leverage and  control for cleaner, more uniform slices every single time.

Who Should Buy This?

  • Cafes & Delis

    Perfect for preparing gluten-free sandwiches and  toast, ensuring no cross-contamination and  keeping customers safe.

  • Contract Caterers

    An essential tool for mobile kitchens and  event catering where strict allergen protocols are non-negotiable.

  • Commercial Bakeries

    Ideal for slicing finished loaves for sale or display, especially those from dedicated gluten-free lines.

  • Hotel Kitchens

    A must-have for the breakfast buffet to provide a dedicated, safe utensil for guests with allergies.

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Ensure every slice is perfect and  safe. Add the Offset Serrated Bread Knife Mercer Culinary FB504 to your kitchen toolkit today.

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