Archive for the ‘Paper’ Category

Decoding Customer’s Specs

January 3, 2018

Richard asks,

I was a given a spec for an RSC with the paper spec’d as:

K7K 230g + 140g + 230g Kraft C/F.

I don’t know how to interpret this. I’ve reached out to our board suppliers, but I thought you may be able to shed some light. I’m assuming this is a standard way to spec board in some other part of the world.

The paperweight is the easiest to decode. To convert the paper weights from grams to #/MSF simply divide the values by 4.88 and round accordingly to match the closest available weight.

Therefore,

  • 230g = 47.13
  • 140g = 28.68

The other parts of the specification may be a code that is specific to the customers operation. The K7K probably denotes Kraft over Kraft liners and not test liner. The 7 is the caliper, 7mm or .177”. The ‘Kraft C/F’ probably denotes Kraft Corrugated Fluting.

However, that’s a lot of ‘probablies’. To be on the safe side I would try to get the customer to confirm the K7K and the C/F.

– Ralph

Dual Arch Medium

December 1, 2017

Bruce asks,

I am searching for a company that manufactures corrugated sheets with dual arch medium capability. Our location is Dalton Ohio, is there anybody you could refer me to please? I know there is a supplier in Florida that does this medium, but freight is too costly.

I have reached out to some industry contacts. I’m awaiting a phone call. Also a search within the iDirectory revealed no information.

While we’re waiting to hear back, let’s toss this one out the readers too! Is anybody near Ohio running double arch?

— Ralph

What the #1W?!

December 1, 2017

Steve asks,

I have a customer asking me to interpret and explain this call out “ 200E #1W”.

The 200E part is easy. It’s the #1W is a bit more ambiguous…I don’t believe it is industry standard expression. Could it be a designation for coated SBS?

Oh yes. A long history here.

# 1 could be Kemi, Coated SBS, or Coated label stock

#2 does not exist anymore or a lightly coated white top or uncoated SBS

#3 is what we refer to today as uncoated white top.

— Ralph

Rod Coating vs. Flood Coating

August 2, 2017

Geordie asks,

We’re considering some new equipment and looking for some information on flood coating versus rod coating.

If I were looking for new equipment I would probably lean toward rod coating. In my opinion rod coating is more effective and accurate than flood coating. Rod coating provides a very wide coating weight range. They also allow much greater precision in coating weight control and are typically much easier to operate. The rod coating process also provides superior cross machine coating uniformity as compared to flood coating.

Most modern rod coater designs make very easy and quick to change the coating thicknesses as well. So if minimizing changeover time is important to you that may be another advantage to rod coating.

— Ralph