Toshiba D-4530 Developer 6LH59142000 Black 500g e-STUDIO

Black Carrier Fill for Mono e-STUDIO Copiers

The Toshiba D-4530 developer is the black two-component carrier fill for a broad set of Toshiba e-STUDIO monochrome copiers. It carries part number 6LH59142000 and ships as a 500 g bottle of developer powder. Service technicians replace it during developer unit overhaul, or when copy density drops and backgrounding appears.

Two-component development mixes toner with magnetic carrier particles. The carrier transfers charge to the toner and holds the triboelectric balance at the developer sleeve. Degraded carrier loses that charging capacity, so copies lighten even while the toner cartridge still holds powder. A fresh D-4530 fill restores the carrier-to-toner ratio and returns density to specification.

Compatible engines include the e-STUDIO 205L, 206L, 225, 255, 256SE, 305, 306, 306SE, 355, 356, 356SE, 455, 456, 456SE, 459SE, and 506SE. Rated developer life varies by engine: entry models run to roughly 80,000 pages, while high-volume units reach about 150,000 pages at 5 percent coverage. Each bottle holds 500 g and ships in a sealed container.

Key Features

• Genuine Toshiba Developer
  The powder comes from Toshiba’s consumable supply chain and matches factory carrier formulation.

• Part Number 6LH59142000
  The label carries the Toshiba number and the D-4530 description for catalogue verification.

• 500 g Sealed Fill
  One bottle charges a single developer unit at the specified fill weight.

• Two-Component Charging Control

  • Carrier particles deliver triboelectric charge to the toner.
  • Stable charging limits background scatter on the drum.
  • Balanced carrier ratio restores solid density on halftones.

• Broad Engine Coverage
  One part number serves entry 205L units through the high-volume 506SE engine.

• Service-Friendly Packaging
  The bottle pours directly into the developer unit hopper without a transfer funnel.

• Extended Service Interval
  Rated life reaches about 150,000 pages on high-volume engines at 5 percent coverage.

Specifications

What’s in the Box

• One 500 g bottle of black developer powder

Why Choose the D-4530 Fill

• The black carrier restores copy density when output fades despite a fresh toner cartridge.

• Genuine Toshiba powder keeps triboelectric charging within the range the developer bias expects.

• A single part number covers fifteen engine variants, which trims spares stock lines.

• The sealed 500 g bottle matches the hopper capacity of the relevant developer units.

• Replacing the fill costs far less than swapping a complete developer assembly.

• Correct carrier weight protects the developer sleeve and doctor blade from premature wear.

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