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Medium and Message: Sticks and crayons
Professional artists have long used brushes to apply paint in their finished work, and many used hand-held sticks of pigment only when sketching in preparation. Charcoal has been widely used, with metal wire in silverpoint an alternative. In the sixteenth century, large deposits of graphite were discovered in Cumbria, England, following which graphite sticks and sheathed pencils became enormously popular among both amateurs and professionals.
Although it’s impossible to make any clear distinction between drawing and painting, those stick-based media are simple compared with oil paints, and seldom used in works comparable in their aims or sophistication to professional oil or watercolour painting.
The first changes in practice resulted from the French Revolution and Napoleonic Wars at the turn of the eighteenth to nineteenth centuries. Graphite was a strategic product, as it was used as a refractory in the manufacture of cannonballs, and supplies to France all but dried up. In 1795 Nicolas-Jacques Conté used a mixture of clay, graphite and other pigments to form sticks similar to pastels but significantly harder, referred to as hard pastels or Conté crayons.

As with charcoal and graphite sticks and pencils, Conté crayons were first used for preparatory sketching. By the middle of the nineteenth century, artists like Jean-François Millet extended their use into pastel paintings including his enchanting and mysterious The Cat at the Window from about 1857-58. Because of their hardness, Conté crayons were more amenable to sharpening, so could make finer lines and a richer range of marks.

Millet’s most famous painting in pastel and Conté crayon is this 1865-66 version of The Sower, a motif that was to recur in the hands of others for the rest of the century, and works perfectly in what were still relatively unconventional media.
Conté crayons, like pencil, charcoal and pastels, rely on mechanical adhesion rather than any polymerising binder. Specialised papers with roughened surfaces were marketed to improve their adhesion, but they share similar problems of longevity. However, at a time when mark-making was becoming popular, the wide range of effects available from sticks of pigment was an attraction: not only could the artist place bold strokes of colour over stumped-smooth areas, but they could also paint on textured grounds to great effect.

One of the masters of the Conté crayon was the Divisionist Georges Seurat, who used textured papers to give his paintings or drawings a highly granular appearance, as if they were photographs.
The rise of industrial chemistry and manufacturing industries in the nineteenth century brought other new painting sticks. Wax crayons effectively functioned as a low-temperature encaustic, and became popular in schools. They were adopted for resist techniques in watercolours, notably by John Singer Sargent, and some artists started using them in combination with other media.

Félicien Rops’ painting of a Hamadryad from about 1885 uses a wide range of media, drawn from those already popular among the illustrators of the day.

Another enthusiast for mixed stick media was Odilon Redon, for instance in his painting of Sîta from about 1893.

Although the mainstream Impressionists largely kept to oil on canvas, those on the periphery including Jean-François Raffaëlli were more experimental in their choice of media: his Parisian Rag Pickers from about 1890 was made using a mixture of oil paints and oil crayons.

The new generation of painters who started their careers in the early twentieth century used stick media increasingly. Egon Schiele was a prolific draftsman who used drawing techniques extensively in his painting. This work showing Krumau Town Crescent (Small Town V) (1915) is based on a drawing he had made the previous year, and uses the unusual combination of black crayon, gouache and oils.

For this Portrait of the Artist’s Wife Seated, Holding Her Right Leg, Schiele used just black crayon and gouache.

Some of the older generation joined in with unusual combinations of media. Late in his life, the former Divisionist Paul Signac painted many brilliantly coloured views of the south of France using combinations of watercolour and crayons, such as Antibes (1917) above, and The Old Port of Marseilles (1931) below.


On the other side of the Atlantic, also late in his career, Joseph Stella developed a novel drawing technique combining traditional metalpoint with modern crayons, which he used in his intimate portrait of Kathleen Millay from about 1923-24, above, and Eggplant, one of his last works, completed in 1944, below.
Metalpoint uses fine metal wire, most commonly silver, mounted in a holder, and is a slow and meticulous method of drawing or painting; its marks on paper are only faint to begin with, but they darken slowly as the fine tracks of silver tarnish.


Late in his career, Pierre Bonnard incorporated stick media in some of his paintings. The richly textured marks in this painting of his wife Marthe in The Bath from 1942 are strokes of coloured crayon, worked over gouache and pastels.

Paul Nash added both graphite and crayon marks to his 1937 watercolour of Three Rooms, a painting with strong graphic elements.
In the nineteen-twenties and -thirties, several art suppliers developed new types of crayon, using proper binders intended to allow more extensive effects and working, greater versatility, and improved longevity. These mixed conventional pigments with a bewildering array of waxes, oils and other substances, including:
- waxes and gums, to make crayons (sheathed in paper) and pencils (in wood);
- waxes, to make grease pencils;
- waxes and oils, to make lithographic crayons;
- mineral wax (paraffin), to make wax crayons;
- synthetic wax (polyethylene), to make water-dispersible wax crayons, such as Caran d’Ache Neocolor crayons;
- waxes and non-drying oils, to make oil pastels;
- waxes and drying oils, to make oil sticks and oil bars, that can form polymerised paint layers similar to conventional oil paints.
Their physical properties, determined by the binders used, in turn determine how they can be applied, appropriate grounds, fragility of the stick and its suitability for sharpening, whether diluents are organic solvents or water, and the depth and robustness of the resulting paint layer.
Unfortunately, even reputable manufacturers seem reluctant to provide detailed information on the lightfastness of pigments used, and to achieve high chroma level in attractive colours they often resort to pigments known to be fugitive on exposure to light. During the twentieth century in particular, this resulted in many fine paintings being made using media that rapidly became a conservation nightmare, either because the paint film has proved unstable, or their initially brilliant colours have faded rapidly.
Some types of media, in particular coloured pencils, have been vulnerable to irresponsible suppliers and artists who have put blind faith in products that have proved ephemeral. Sadly, few artists have obeyed the exhortation for the buyer to beware, and assessed the permanence of the media they have used in paintings which have been sold for large sums.
Among the most recent, and still unproven, media are oil pastels, which work into creamy layers, and undergo only limited hardening because they don’t incorporate drying oils like linseed or walnut. Their origins are controversial: first developed in Japan, and slightly later in Europe, it’s claimed that Pablo Picasso preferred them.

Oil pastels have certainly shown themselves capable in some unusual circumstances, such as Robert Clark Templeton’s court paintings, including his Sketch of an Overview of the Courtroom from 1971. Few courts would have even considered him using watercolours, for example, and for this case he chose modern and unobtrusive oil pastels. This sketch has been executed briskly, with effective use of gestures and marks.

Once a sketch has been laid down in oil pastels, it’s quick to work that up into a more detailed portrait like Templeton’s Drawing for CBS Evening News of Bobby G. Seale and others (1971).
Copyright restrictions prevent me from showing examples of stick media in the hands of modern artists, but I conclude by showing a couple of my own amateur efforts.

This Alpine landscape was painted in the studio using Sennelier oil pastels on Daler Rowney Ingres pastel paper.

This dawn view of the Pont Royal in the centre of Paris was painted with Caran d’Ache water-dispersible Neocolor crayons on paper. This uses base washes brought out from an initial dry crayon sketch, with superimposed texturing using dry crayon – something hard to achieve in watercolour.
Modern stick-based media look alluring, and are persuasively marketed by their vendors. However, those are seldom the traditional art materials suppliers that they might seem: most have been bought up by large companies that are primarily driven by increasing sales revenues, and may have little understanding of the requirements and problems of painting media.
Modern vendors are often secretive over the composition of their products, and although good standards exist for lightfastness, few publish data for their product ranges. Finally, their advantages in the making of art are often marred by the need to protect these paintings under glass.

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Mastodon: 将媒体文件存放在本地(docker 版)
本攻略适用于——
- 自建 mastodon(非大站)
- 使用 docker compose
- 将媒体文件直接保存在服务器上,而不使用 s3 外部存储
这个搭配虽然不多见,但其实用起来满爽的。很多人用的 s3 服务都是在薅羊毛,而 mastodon 那个变态的,把别人家的媒体文件缓存到自家的架构,流量的吞吐其实很大的(开了 relay 就更夸张),薅羊毛时很容易就超出了。反而是 vps 本身的流量上限很高。对于个人建站而言,媒体文件总量通常 <50GB,某些 vps 自带 200GB 硬盘,足够用了。
缺点是,除了数据库定期备份外,也要考虑媒体文件的异地备份问题。但其实只需要备份存储本地附件的 media_attachments,而 cache 是不需要备份的,所以工作量也不大。
两年前我把媒体文件转移到本地时,参照了 antisocial science 的设置。但因为我用 docker,官方默认的设置,docker 内外权限不一致,无法将媒体文件写到本地。于是匆匆又在本地建了个 minio s3 来中转……这样其实很浪费资源了,minio 的开销也不小。所以最近趁着搬家,又试了一下,终于把 docker + 本地存储 跑通了。
1. 在 docker-compose.yml 里,
web 和 sidekiq 容器中,已经预设了媒体文件的卷映射
volumes:
- ./public/system:/mastodon/public/system
这个不用动。——也可以改成其它的路径,但要和后面的设置一致(本文用相同的颜色标明)。
2. 修改 .env.production
S3_ENABLED=false
PAPERCLIP_ROOT_PATH=/mastodon/public/system
PAPERCLIP_ROOT_URL=/fivestone-mastodon-media
PAPERCLIP_ROOT_URL 是服务器的所有媒体文件链接的子文件夹名称,形如:
https://mastodon.fivest.one/fivestone-mastodon-media/media_attachments/.../x.jpg
默认值是 /system;但是建议改成独特一些的名字,而且建议和 S3_BUCKET 一致。以后需要在本地存储和 s3 之间转换时,可以省一点心。(所以要独特一些,防止回头在 s3 上和别人撞名)
3. 修改 nginx 的域名配置文件
参照官方的配置,把域名文件夹里的 proxy_pass ,直接改成本地的 alias
server
{
server_name mastodon.fivest.one;
# ......
location /fivestone-mastodon-media/
{
alias /path-to...docker-compose-folder/public/system/ ;
proxy_cache CACHE;
proxy_cache_valid 200 48h;
proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
proxy_cache_lock on;
expires 1y;
add_header Cache-Control public;
add_header 'Access-Control-Allow-Origin' '*';
add_header X-Cache-Status $upstream_cache_status;
add_header X-Content-Type-Options nosniff;
add_header Content-Security-Policy "default-src 'none'; form-action 'none'";
}
}
然后重启 nginx
sudo systemctl reload nginx.service
4. 通过 docker 设置媒体文件夹的权限
在 docker 内部,是以 mastodon 用户的身份,来运行程序的,所以要把媒体文件夹的所有者改成(docker 内部的)mastodon:
sudo docker-compose run --user=root --rm web chown -R mastodon /mastodon/public/system
如果是从 s3 迁移到本地,把媒体文件移入这个本地文件夹(/path-to…docker-compose-folder/public/system/)后,也要再执行一遍上面这条命令。
或者在 mastodon docker 服务已经启动的情况下,执行:
sudo docker exec -u 0 mastodon_container_web chown -R mastodon /mastodon/public/system
但在这条命令执行结束之前,mastodon 在后台写入媒体文件时,仍然可能出现文件夹权限不足,无法写入的问题。
