What lead size to use for general writing

Finally, a "scientific" test about the best lead size to use in an everyday situation. I don't think anyone has asked the question, but I am here to find out the answer.

I will start with, science is hard, or at least my pseudoscience is. I will test how the most common lead size perform:
0.5 / 0.7 / 0.9 or 1.0
0.9 and 1.0 is the same size, but different producers refer to it differently. From now on, I will refer to both sizes as 1.0

I guess you already have the answer to my question. Which ever lead size you like the most is the best, and I probably say 0.7 is the most usual lead of them all. But I am going further with my quest. So prepare ... 

The so-called test

I wanted to see how much lead is used for the same amount of writing using each of the lead sizes mentioned above.
This is hard work, and I do not think I will be doing science anytime soon after all this experimenting.
I used Rotring HB leads with the aforementioned sizes 0.5; 0.7; 1.0. Other brands might offer different results because of the lead hardness "... 2B B HB H 2H ..." is not standardized. So HB from other suppliers might be softer or harder.
I started the test by writing 1-page size A4 (254x297 mm). To be as consistent as humanly possible, I used "math" paper and wrote in every single cell of the paper with very little pressure, and the same letter height, the letters of the alphabet over and over again. I preferred this method instead of freehand, so the results will be as scientific as correct as they can get.

This is not representative of real world writing, but it doesn't have to be. The important part of the test is comparing the leads to each other and see what are the differences.

 After I wrote a few pages with each of the leads that are participating in the writing test, I measured the length of the remaining lead.

The results

In theory, I could have written with a single lead, size 0.5 mm, - 30 pages, but I have to take into account that when the lead becomes too small you have to throw it away, so more realistic I would say 27 pages.
Of course, this depends a lot on how small or big do you write, how condensed, how much pressure etc. So don't focus on this figure, as it is not the important one. The difference between the test results says the story.
The 0.7 mm can write in theory 60 pages and the 1.0 mm over 120 pages. This means that the writing you are able to do with 1 lead doubles every time you bump up the lead size.
Because I could not measure the lead used up on a single page with size 1.0 (under half of mm) I cranked up the pace and applied extra pressure and made a bunch of lines and X.

So after the endurance test the 0.5 mm lost 3.5 mm; the 0.7 mm lost 1.5 mm, and the 1.0 lost 0.5 mm from its total length
It does not seem a lot but assuming I could use the entire lead, 60 mm, the 1.0 size I could do as much writing as with 3 pieces of 0.7 mm lead or 7 pieces of 0.5 lead.
Similarly, if you would take the 0.7 mm as a benchmark, then I would need 2.33 pieces of 0.5 mm lead to do the same amount of writing.

Conclusion

You should choose the thicker lead, especially if you have a heavier hand, for three reasons.
1) The first reason is the price. The price of lead is usually the same for all thicknesses.
You will pay 3 times more if you use 0.7 lead instead of  1.0
You will pay 7 times more if you use 0.5 lead instead of  1.0
You will pay 2.33 times more if you use 0.5 lead instead of  0.7

2) The second reason is the advancing of the lead. The less lead you use, fewer clicks you will have to make. So in a long writing session, a thicker lead is bliss.

3) And third, the risk of breaking the lead is smaller with thicker lead.

Ok, you may ask, "Won't the line be too thick if I use 1.0 mm?"
It will, but not by a lot. There is a small difference between the 0.7 mm and the 1.0 mm lead. The downside is that you have to rotate the pen in your hand more often when you use 1.0 mm lead.

      

1.0 mm vs 0.5 mm lead

1.0 mm vs 0.7 mm lead

           

     

A Rolex and a Montegrappa

I have talked before why people chose to use a fountain pen. My conclusion is they chose for the same reason they chose to wear a mechanical watch. And I think the two are a match made in heaven.
Maybe Rolex Rainbow is not the most conspicuous watch to wear, but I think it will go really well with the Montegrappa Rainbow. Assorting your watch with the fountain pen could be a new trend.

And I think that was what Nomos was trying to do with the rebranded Kaweco, even though for me both are more valuable on their own. Rather than having a weird branded fountain pen I would go for the "real" one if I can say so.

But maybe we should take the good idea behind this. When you buy a Kaweco make sure to buy a Nomos, and vice versa.

Follow the link to see the post with the first watch - fountain pen combo, a match made in heaven between Kaweco sport and Nomos.

Pencils in hotel rooms, Stabilo Schwan 306

Usually, hotels offer you a little notepad and ballpoint to write down things, but I was greeted in my short Hamburg visit by an HB Stabilo Schwan 306 pencil.

I found the markings on it curious, as I know the US marks the lead harness by numbers and HB is the #2 pencil. Well, this is a 2 1/2 pencil so a bit harder than a regular HB.
The finish of the pencil was made for this hotel room, it looks like woody and unfinished. Like a raw pencil. The same feeling the room left me, an old cabin in the woods, except it wasn't in the woods.
I do not know if it was a calculated decision to leave this particular pencil in the room or it was just a coincidence.
So, on the natural finish of the pencil, the brand name, and model number are written in a very dark paint.
The lines put down by the pencil look dark enough and smooth, so no complaints about the writing or the handling of the pencil.
I had to take the paper back to the lab (back home) to test the ease with which the lines are erased from the paper. And it is no problem, it erases well.
Also, there is no sharpening test, as I did not have my Opinel #8 with me.

All in all, it is an ok pencil, that has an interesting finish that goes well with the looks of a cabin in the woods.

Preview OHTO Conception Mechanical Pencil

A few days ago I received in the mail a small but very impressive package.
Thanks to: Stationery Wiki, and the people who made it possible
Matthias from Bleistift blog the mechanical pencil sponsor
Dave from Dave's mechanical pencils judge
Brad from The Pen Addict judge

How I got the mechanical pencil?
I ended up with this beautiful mechanical pencil as a prize in a competition hosted by Stationery Wiki. I participated with a post on the wiki about the Rotring 500. Irony or not I could choose between a Rotring 500 and the OHTO Conception. I chose the OHTO Conception because I am not familiar with the brand and their products
I also got a cup

What is Stationery Wiki?
A place where to find information and facts about stationery related products and these great people are the

Why this wiki and not Wikipedia?
Because Wikipedia has a filter and if it considers that the page is not of great importance for the public it will delete it to save precious space. At the same time, it can be tricky to find information about pencils, fountain pens, and other similar products and companies.
I wrote a few posts in which I tried to start from the beginning and go to the present days (short timelines): Rotring Tikky, Rotring 500 (the runner up post), Koh-I-Noor Versatil. And every time it was a difficult task.
The Rotring Tikky post was planned more than half of year before i started to write it. Partially because it was hard getting all the info, partly because I wanted to find more info and confirm what I have found, and largely because many times I am pretty busy and when I am not I am lazy :)
Joking aside the project is a great cause and I am a supporter of it.

I did not had the time to enjoy the pencil yet as I was on the road most of last and this week. I will make time for writing a review of the OHTO Conception in 0.3 mm shortly.
Until then you can read the review of the OHTO Conception on Bleistift. Some time has passed since I read this post and can't remember the conclusion or the positives and negatives. So it will be interesting to see how I rate it compared to Matthias.