Paper exit tray curls paper on 8139e

[PK7285]

Has anyone found a way to extend the paper exit tray on the 8139e so that it doesn't curl the paper coming out anytime the humidity's over about 20%?  Thanks.

[Dragon-Fur]

@PK7285 

Welcome to the HP English Community --

Dragon Opinion

Typical indoor humidity varies by global location and indoor conditions.

Example - Our home office - Inside humidity - West Coast USA - A bit Inland from the Pacific coast > 49%

In our area, 20% might be considered very dry -- but sure, it depends on what is normal for your locale.

If the humidity is too high regardless of numbers, measurements, and examples offered by documents and strangers,

and

If the printer hardware is operating within specification (not broken, out of alignment, other mechanical issues),

and

If the paper is not too thin, thin and recycled, possibly prone to "curl" due to paper type / manufacture,

and

If the paper is indeed curling due to humidity ,

then

Perhaps try a (much) heavier paper to counteract the "curl effect".

For example,

The printer supports HP Professional / Brochure Paper at 32lb / 180 gsm.

I use HP Professional paper in my OfficeJet Pro 9135e --

Really nice paper - Not cheap (costs more than standard office paper types / weights) -

Clean, well maintained 9135e printer combined with this paper produces an excellent print result.

No curling at the indoor humidity used in my example (49%).

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Message Content References

 User Guide - HP OfficeJet Pro 8120e - HP OfficeJet Pro 8130e Series

Specifications - Starting on Page 112

Example - Media Specs

Media Handling, Document Finishing	Sheet feed
Media Size (facet)	Letter; A4; Legal; B5
Media Sizes Custom (imperial)	Tray 1: 3 x 5 to 8.5 x 14 in
Media Sizes Custom (metric)	Tray 1: 76.2 x 127 to 215.9 x 355.6 mm
Media Types	Plain Paper, HP Photo Papers, HP Matte Brochure or Professional Paper, HP Matte Presentation Paper, HP Glossy Brochure or Professional Paper, Other Photo Inkjet Papers, Other Matte Inkjet Papers, Other Glossy Inkjet Papers, Thick Plain Paper,Light/Recycled Plain Paper,HP Tri-fold Brochure Paper, Glossy
Media Weight Recommended (imperial)	16 to 28 lb (plain paper); 60 to 75 lb (photo); 20 to 24 lb (envelope); 90 to 110 lb (card)
Media Weight Recommended (metric)	60 to 105 g/m² (plain); 220 to 280 g/m² (photo); 75 to 90 g/m² (envelope); 163 to 200 g/m² (card)
Media Weights Supported, By Paper Path (Imperial)	16 to 28 lb (plain paper); 60 to 75 lb (photo); 20 to 24 lb (envelope); 90 to 110 lb (card)
Media Weights Supported, By Paper Path (metric)	60 to 105 g/m² (plain); 220 to 280 g/m² (photo); 75 to 90 g/m² (envelope); 163 to 200 g/m² (card)

Example - Operating Specs

Operating Altitude (imperial)	10,000 ft
Operating Altitude (metric)	3000 m
Operating Humidity Range	20 to 80% RH
Operating Humidity Range (recommended)	25 to 75% RH
Operating System (supported note)	Windows Server 2016 64-bit, Windows Server 2019 64-bit, Windows Server 2022 64-bit; Linux (For more information see http://developers.hp.com/hp-linux-imaging-and-printing)
Operating Temperature Range (celsius)	5 to 40°C
Operating Temperature Range (fahrenheit)	41 to 104°F
Operating Temperature Range (recommended celsius)	15 to 32°C
Operating Temperature Range (recommended fahrenheit)	59 to 90°F

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